diff --git a/package.json b/package.json
index 9a02581..44aa676 100644
--- a/package.json
+++ b/package.json
@@ -17,10 +17,10 @@
     "@types/expect": "^24.3.0",
     "@types/mocha": "^7.0.2",
     "@types/node": "11",
-    "expect": "^25.3.0",
-    "mocha": "^7.1.1",
+    "expect": "^26.0.1",
+    "mocha": "^7.1.2",
     "ts-mocha": "^7.0.0",
-    "tslint": "^6.1.1",
+    "tslint": "^6.1.2",
     "typescript": "^3.8.3"
   },
   "dependencies": {
diff --git a/yarn.lock b/yarn.lock
index de734d1..c3e68db 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -54,15 +54,15 @@
     "@types/istanbul-reports" "^1.1.1"
     "@types/yargs" "^13.0.0"
 
-"@jest/types@^25.3.0":
-  version "25.3.0"
-  resolved "https://registry.yarnpkg.com/@jest/types/-/types-25.3.0.tgz#88f94b277a1d028fd7117bc1f74451e0fc2131e7"
-  integrity sha512-UkaDNewdqXAmCDbN2GlUM6amDKS78eCqiw/UmF5nE0mmLTd6moJkiZJML/X52Ke3LH7Swhw883IRXq8o9nWjVw==
+"@jest/types@^26.0.1":
+  version "26.0.1"
+  resolved "https://registry.yarnpkg.com/@jest/types/-/types-26.0.1.tgz#b78333fbd113fa7aec8d39de24f88de8686dac67"
+  integrity sha512-IbtjvqI9+eS1qFnOIEL7ggWmT+iK/U+Vde9cGWtYb/b6XgKb3X44ZAe/z9YZzoAAZ/E92m0DqrilF934IGNnQA==
   dependencies:
     "@types/istanbul-lib-coverage" "^2.0.0"
     "@types/istanbul-reports" "^1.1.1"
     "@types/yargs" "^15.0.0"
-    chalk "^3.0.0"
+    chalk "^4.0.0"
 
 "@types/body-parser@*":
   version "1.17.1"
@@ -494,6 +494,14 @@ chalk@^3.0.0:
     ansi-styles "^4.1.0"
     supports-color "^7.1.0"
 
+chalk@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/chalk/-/chalk-4.0.0.tgz#6e98081ed2d17faab615eb52ac66ec1fe6209e72"
+  integrity sha512-N9oWFcegS0sFr9oh1oz2d7Npos6vNoWW9HvtCg5N1KRFpUhaAhvTv5Y58g880fZaEYSNm3qDz8SU1UrGvp+n7A==
+  dependencies:
+    ansi-styles "^4.1.0"
+    supports-color "^7.1.0"
+
 chokidar@3.3.0:
   version "3.3.0"
   resolved "https://registry.yarnpkg.com/chokidar/-/chokidar-3.3.0.tgz#12c0714668c55800f659e262d4962a97faf554a6"
@@ -701,10 +709,10 @@ diff-sequences@^24.9.0:
   resolved "https://registry.yarnpkg.com/diff-sequences/-/diff-sequences-24.9.0.tgz#5715d6244e2aa65f48bba0bc972db0b0b11e95b5"
   integrity sha512-Dj6Wk3tWyTE+Fo1rW8v0Xhwk80um6yFYKbuAxc9c3EZxIHFDYwbi34Uk42u1CdnIiVorvt4RmlSDjIPyzGC2ew==
 
-diff-sequences@^25.2.6:
-  version "25.2.6"
-  resolved "https://registry.yarnpkg.com/diff-sequences/-/diff-sequences-25.2.6.tgz#5f467c00edd35352b7bca46d7927d60e687a76dd"
-  integrity sha512-Hq8o7+6GaZeoFjtpgvRBUknSXNeJiCx7V9Fr94ZMljNiCr9n9L8H8aJqgWOQiDDGdyn29fRNcDdRVJ5fdyihfg==
+diff-sequences@^26.0.0:
+  version "26.0.0"
+  resolved "https://registry.yarnpkg.com/diff-sequences/-/diff-sequences-26.0.0.tgz#0760059a5c287637b842bd7085311db7060e88a6"
+  integrity sha512-JC/eHYEC3aSS0vZGjuoc4vHA0yAQTzhQQldXMeMF+JlxLGJlCO38Gma82NV9gk1jGFz8mDzUMeaKXvjRRdJ2dg==
 
 diff@3.5.0, diff@^3.1.0:
   version "3.5.0"
@@ -817,6 +825,11 @@ escape-string-regexp@1.0.5, escape-string-regexp@^1.0.5:
   resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
   integrity sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ=
 
+escape-string-regexp@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-2.0.0.tgz#a30304e99daa32e23b2fd20f51babd07cffca344"
+  integrity sha512-UpzcLCXolUWcNu5HtVMHYdXJjArjsF9C0aNnquZYY4uW/Vu0miy5YoWvbV345HauVvcAUnpRuhMMcqTcGOY2+w==
+
 esprima@^4.0.0:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/esprima/-/esprima-4.0.1.tgz#13b04cdb3e6c5d19df91ab6987a8695619b0aa71"
@@ -857,17 +870,17 @@ expect@*:
     jest-message-util "^24.9.0"
     jest-regex-util "^24.9.0"
 
-expect@^25.3.0:
-  version "25.3.0"
-  resolved "https://registry.yarnpkg.com/expect/-/expect-25.3.0.tgz#5fd36e51befd05afb7184bc954f8a4792d184c71"
-  integrity sha512-buboTXML2h/L0Kh44Ys2Cx49mX20ISc5KDirkxIs3Q9AJv0kazweUAbukegr+nHDOvFRKmxdojjIHCjqAceYfg==
+expect@^26.0.1:
+  version "26.0.1"
+  resolved "https://registry.yarnpkg.com/expect/-/expect-26.0.1.tgz#18697b9611a7e2725e20ba3ceadda49bc9865421"
+  integrity sha512-QcCy4nygHeqmbw564YxNbHTJlXh47dVID2BUP52cZFpLU9zHViMFK6h07cC1wf7GYCTIigTdAXhVua8Yl1FkKg==
   dependencies:
-    "@jest/types" "^25.3.0"
+    "@jest/types" "^26.0.1"
     ansi-styles "^4.0.0"
-    jest-get-type "^25.2.6"
-    jest-matcher-utils "^25.3.0"
-    jest-message-util "^25.3.0"
-    jest-regex-util "^25.2.6"
+    jest-get-type "^26.0.0"
+    jest-matcher-utils "^26.0.1"
+    jest-message-util "^26.0.1"
+    jest-regex-util "^26.0.0"
 
 express@^4.17.1:
   version "4.17.1"
@@ -1117,6 +1130,11 @@ graceful-fs@^4.1.3:
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.2.tgz#6f0952605d0140c1cfdb138ed005775b92d67b02"
   integrity sha512-IItsdsea19BoLC7ELy13q1iJFNmd7ofZH5+X/pJr90/nRoPEX0DJo1dHDbgtYWOhJhcCgMDTOw84RZ72q6lB+Q==
 
+graceful-fs@^4.2.4:
+  version "4.2.4"
+  resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.4.tgz#2256bde14d3632958c465ebc96dc467ca07a29fb"
+  integrity sha512-WjKPNJF79dtJAVniUlGGWHYGz2jWxT6VhN/4m1NdkbZ2nOsEF+cI1Edgql5zCRhs/VsQYRvrXctxktVXZUkixw==
+
 growl@1.10.5:
   version "1.10.5"
   resolved "https://registry.yarnpkg.com/growl/-/growl-1.10.5.tgz#f2735dc2283674fa67478b10181059355c369e5e"
@@ -1466,25 +1484,25 @@ jest-diff@^24.9.0:
     jest-get-type "^24.9.0"
     pretty-format "^24.9.0"
 
-jest-diff@^25.3.0:
-  version "25.3.0"
-  resolved "https://registry.yarnpkg.com/jest-diff/-/jest-diff-25.3.0.tgz#0d7d6f5d6171e5dacde9e05be47b3615e147c26f"
-  integrity sha512-vyvs6RPoVdiwARwY4kqFWd4PirPLm2dmmkNzKqo38uZOzJvLee87yzDjIZLmY1SjM3XR5DwsUH+cdQ12vgqi1w==
+jest-diff@^26.0.1:
+  version "26.0.1"
+  resolved "https://registry.yarnpkg.com/jest-diff/-/jest-diff-26.0.1.tgz#c44ab3cdd5977d466de69c46929e0e57f89aa1de"
+  integrity sha512-odTcHyl5X+U+QsczJmOjWw5tPvww+y9Yim5xzqxVl/R1j4z71+fHW4g8qu1ugMmKdFdxw+AtQgs5mupPnzcIBQ==
   dependencies:
-    chalk "^3.0.0"
-    diff-sequences "^25.2.6"
-    jest-get-type "^25.2.6"
-    pretty-format "^25.3.0"
+    chalk "^4.0.0"
+    diff-sequences "^26.0.0"
+    jest-get-type "^26.0.0"
+    pretty-format "^26.0.1"
 
 jest-get-type@^24.9.0:
   version "24.9.0"
   resolved "https://registry.yarnpkg.com/jest-get-type/-/jest-get-type-24.9.0.tgz#1684a0c8a50f2e4901b6644ae861f579eed2ef0e"
   integrity sha512-lUseMzAley4LhIcpSP9Jf+fTrQ4a1yHQwLNeeVa2cEmbCGeoZAtYPOIv8JaxLD/sUpKxetKGP+gsHl8f8TSj8Q==
 
-jest-get-type@^25.2.6:
-  version "25.2.6"
-  resolved "https://registry.yarnpkg.com/jest-get-type/-/jest-get-type-25.2.6.tgz#0b0a32fab8908b44d508be81681487dbabb8d877"
-  integrity sha512-DxjtyzOHjObRM+sM1knti6or+eOgcGU4xVSb2HNP1TqO4ahsT+rqZg+nyqHWJSvWgKC5cG3QjGFBqxLghiF/Ig==
+jest-get-type@^26.0.0:
+  version "26.0.0"
+  resolved "https://registry.yarnpkg.com/jest-get-type/-/jest-get-type-26.0.0.tgz#381e986a718998dbfafcd5ec05934be538db4039"
+  integrity sha512-zRc1OAPnnws1EVfykXOj19zo2EMw5Hi6HLbFCSjpuJiXtOWAYIjNsHVSbpQ8bDX7L5BGYGI8m+HmKdjHYFF0kg==
 
 jest-matcher-utils@^24.9.0:
   version "24.9.0"
@@ -1496,15 +1514,15 @@ jest-matcher-utils@^24.9.0:
     jest-get-type "^24.9.0"
     pretty-format "^24.9.0"
 
-jest-matcher-utils@^25.3.0:
-  version "25.3.0"
-  resolved "https://registry.yarnpkg.com/jest-matcher-utils/-/jest-matcher-utils-25.3.0.tgz#76765788a26edaa8bc5f0100aea52ae383559648"
-  integrity sha512-ZBUJ2fchNIZt+fyzkuCFBb8SKaU//Rln45augfUtbHaGyVxCO++ANARdBK9oPGXU3hEDgyy7UHnOP/qNOJXFUg==
+jest-matcher-utils@^26.0.1:
+  version "26.0.1"
+  resolved "https://registry.yarnpkg.com/jest-matcher-utils/-/jest-matcher-utils-26.0.1.tgz#12e1fc386fe4f14678f4cc8dbd5ba75a58092911"
+  integrity sha512-PUMlsLth0Azen8Q2WFTwnSkGh2JZ8FYuwijC8NR47vXKpsrKmA1wWvgcj1CquuVfcYiDEdj985u5Wmg7COEARw==
   dependencies:
-    chalk "^3.0.0"
-    jest-diff "^25.3.0"
-    jest-get-type "^25.2.6"
-    pretty-format "^25.3.0"
+    chalk "^4.0.0"
+    jest-diff "^26.0.1"
+    jest-get-type "^26.0.0"
+    pretty-format "^26.0.1"
 
 jest-message-util@^24.9.0:
   version "24.9.0"
@@ -1520,28 +1538,29 @@ jest-message-util@^24.9.0:
     slash "^2.0.0"
     stack-utils "^1.0.1"
 
-jest-message-util@^25.3.0:
-  version "25.3.0"
-  resolved "https://registry.yarnpkg.com/jest-message-util/-/jest-message-util-25.3.0.tgz#e3836826fe5ca538a337b87d9bd2648190867f85"
-  integrity sha512-5QNy9Id4WxJbRITEbA1T1kem9bk7y2fD0updZMSTNHtbEDnYOGLDPAuFBhFgVmOZpv0n6OMdVkK+WhyXEPCcOw==
+jest-message-util@^26.0.1:
+  version "26.0.1"
+  resolved "https://registry.yarnpkg.com/jest-message-util/-/jest-message-util-26.0.1.tgz#07af1b42fc450b4cc8e90e4c9cef11b33ce9b0ac"
+  integrity sha512-CbK8uQREZ8umUfo8+zgIfEt+W7HAHjQCoRaNs4WxKGhAYBGwEyvxuK81FXa7VeB9pwDEXeeKOB2qcsNVCAvB7Q==
   dependencies:
     "@babel/code-frame" "^7.0.0"
-    "@jest/types" "^25.3.0"
+    "@jest/types" "^26.0.1"
     "@types/stack-utils" "^1.0.1"
-    chalk "^3.0.0"
+    chalk "^4.0.0"
+    graceful-fs "^4.2.4"
     micromatch "^4.0.2"
     slash "^3.0.0"
-    stack-utils "^1.0.1"
+    stack-utils "^2.0.2"
 
 jest-regex-util@^24.9.0:
   version "24.9.0"
   resolved "https://registry.yarnpkg.com/jest-regex-util/-/jest-regex-util-24.9.0.tgz#c13fb3380bde22bf6575432c493ea8fe37965636"
   integrity sha512-05Cmb6CuxaA+Ys6fjr3PhvV3bGQmO+2p2La4hFbU+W5uOc479f7FdLXUWXw4pYMAhhSZIuKHwSXSu6CsSBAXQA==
 
-jest-regex-util@^25.2.6:
-  version "25.2.6"
-  resolved "https://registry.yarnpkg.com/jest-regex-util/-/jest-regex-util-25.2.6.tgz#d847d38ba15d2118d3b06390056028d0f2fd3964"
-  integrity sha512-KQqf7a0NrtCkYmZZzodPftn7fL1cq3GQAFVMn5Hg8uKx/fIenLEobNanUxb7abQ1sjADHBseG/2FGpsv/wr+Qw==
+jest-regex-util@^26.0.0:
+  version "26.0.0"
+  resolved "https://registry.yarnpkg.com/jest-regex-util/-/jest-regex-util-26.0.0.tgz#d25e7184b36e39fd466c3bc41be0971e821fee28"
+  integrity sha512-Gv3ZIs/nA48/Zvjrl34bf+oD76JHiGDUxNOVgUjh3j890sblXryjY4rss71fPtD/njchl6PSE2hIhvyWa1eT0A==
 
 js-tokens@^4.0.0:
   version "4.0.0"
@@ -1817,10 +1836,10 @@ mixin-deep@^1.2.0:
     for-in "^1.0.2"
     is-extendable "^1.0.1"
 
-mkdirp@0.5.3:
-  version "0.5.3"
-  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.3.tgz#5a514b7179259287952881e94410ec5465659f8c"
-  integrity sha512-P+2gwrFqx8lhew375MQHHeTlY8AuOJSrGf0R5ddkEndUkmwpgUob/vQuBD1V22/Cw1/lJr4x+EjllSezBThzBg==
+mkdirp@0.5.5, mkdirp@^0.5.3:
+  version "0.5.5"
+  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.5.tgz#d91cefd62d1436ca0f41620e251288d420099def"
+  integrity sha512-NKmAlESf6jMGym1++R0Ra7wvhV+wFW63FaSOFPwRahvea0gMUcGUhVeAg/0BC0wiv9ih5NYPB1Wn1UEI1/L+xQ==
   dependencies:
     minimist "^1.2.5"
 
@@ -1831,17 +1850,10 @@ mkdirp@^0.5.1:
   dependencies:
     minimist "0.0.8"
 
-mkdirp@^0.5.3:
-  version "0.5.5"
-  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.5.tgz#d91cefd62d1436ca0f41620e251288d420099def"
-  integrity sha512-NKmAlESf6jMGym1++R0Ra7wvhV+wFW63FaSOFPwRahvea0gMUcGUhVeAg/0BC0wiv9ih5NYPB1Wn1UEI1/L+xQ==
-  dependencies:
-    minimist "^1.2.5"
-
-mocha@^7.1.1:
-  version "7.1.1"
-  resolved "https://registry.yarnpkg.com/mocha/-/mocha-7.1.1.tgz#89fbb30d09429845b1bb893a830bf5771049a441"
-  integrity sha512-3qQsu3ijNS3GkWcccT5Zw0hf/rWvu1fTN9sPvEd81hlwsr30GX2GcDSSoBxo24IR8FelmrAydGC6/1J5QQP4WA==
+mocha@^7.1.2:
+  version "7.1.2"
+  resolved "https://registry.yarnpkg.com/mocha/-/mocha-7.1.2.tgz#8e40d198acf91a52ace122cd7599c9ab857b29e6"
+  integrity sha512-o96kdRKMKI3E8U0bjnfqW4QMk12MwZ4mhdBTf+B5a1q9+aq2HRnj+3ZdJu0B/ZhJeK78MgYuv6L8d/rA5AeBJA==
   dependencies:
     ansi-colors "3.2.3"
     browser-stdout "1.3.1"
@@ -1856,7 +1868,7 @@ mocha@^7.1.1:
     js-yaml "3.13.1"
     log-symbols "3.0.0"
     minimatch "3.0.4"
-    mkdirp "0.5.3"
+    mkdirp "0.5.5"
     ms "2.1.1"
     node-environment-flags "1.0.6"
     object.assign "4.1.0"
@@ -2097,12 +2109,12 @@ pretty-format@^24.9.0:
     ansi-styles "^3.2.0"
     react-is "^16.8.4"
 
-pretty-format@^25.3.0:
-  version "25.3.0"
-  resolved "https://registry.yarnpkg.com/pretty-format/-/pretty-format-25.3.0.tgz#d0a4f988ff4a6cd350342fdabbb809aeb4d49ad5"
-  integrity sha512-wToHwF8bkQknIcFkBqNfKu4+UZqnrLn/Vr+wwKQwwvPzkBfDDKp/qIabFqdgtoi5PEnM8LFByVsOrHoa3SpTVA==
+pretty-format@^26.0.1:
+  version "26.0.1"
+  resolved "https://registry.yarnpkg.com/pretty-format/-/pretty-format-26.0.1.tgz#a4fe54fe428ad2fd3413ca6bbd1ec8c2e277e197"
+  integrity sha512-SWxz6MbupT3ZSlL0Po4WF/KujhQaVehijR2blyRDCzk9e45EaYMVhMBn49fnRuHxtkSpXTes1GxNpVmH86Bxfw==
   dependencies:
-    "@jest/types" "^25.3.0"
+    "@jest/types" "^26.0.1"
     ansi-regex "^5.0.0"
     ansi-styles "^4.0.0"
     react-is "^16.12.0"
@@ -2475,6 +2487,13 @@ stack-utils@^1.0.1:
   resolved "https://registry.yarnpkg.com/stack-utils/-/stack-utils-1.0.2.tgz#33eba3897788558bebfc2db059dc158ec36cebb8"
   integrity sha512-MTX+MeG5U994cazkjd/9KNAapsHnibjMLnfXodlkXw76JEea0UiNzrqidzo1emMwk7w5Qhc9jd4Bn9TBb1MFwA==
 
+stack-utils@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/stack-utils/-/stack-utils-2.0.2.tgz#5cf48b4557becb4638d0bc4f21d23f5d19586593"
+  integrity sha512-0H7QK2ECz3fyZMzQ8rH0j2ykpfbnd20BFtfg/SqVC2+sCTtcw0aDTGB7dk+de4U4uUeuz6nOtJcrkFFLG1B0Rg==
+  dependencies:
+    escape-string-regexp "^2.0.0"
+
 static-extend@^0.1.1:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/static-extend/-/static-extend-0.1.2.tgz#60809c39cbff55337226fd5e0b520f341f1fb5c6"
@@ -2688,10 +2707,10 @@ tslib@^1.8.1:
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.10.0.tgz#c3c19f95973fb0a62973fb09d90d961ee43e5c8a"
   integrity sha512-qOebF53frne81cf0S9B41ByenJ3/IuH8yJKngAX35CmiZySA0khhkovshKK+jGCaMnVomla7gVlIcc3EvKPbTQ==
 
-tslint@^6.1.1:
-  version "6.1.1"
-  resolved "https://registry.yarnpkg.com/tslint/-/tslint-6.1.1.tgz#ac03fbd17f85bfefaae348b353b25a88efe10cde"
-  integrity sha512-kd6AQ/IgPRpLn6g5TozqzPdGNZ0q0jtXW4//hRcj10qLYBaa3mTUU2y2MCG+RXZm8Zx+KZi0eA+YCrMyNlF4UA==
+tslint@^6.1.2:
+  version "6.1.2"
+  resolved "https://registry.yarnpkg.com/tslint/-/tslint-6.1.2.tgz#2433c248512cc5a7b2ab88ad44a6b1b34c6911cf"
+  integrity sha512-UyNrLdK3E0fQG/xWNqAFAC5ugtFyPO4JJR1KyyfQAyzR8W0fTRrC91A8Wej4BntFzcvETdCSDa/4PnNYJQLYiA==
   dependencies:
     "@babel/code-frame" "^7.0.0"
     builtin-modules "^1.1.1"