Add strict check for awesome_bot link checking.

.editorconfig

@@ -7,3 +7,7 @@ indent_style = tab
 indent_size = 4
 insert_final_newline = true
 trim_trailing_whitespace = true
+
+[*.yml]
+indent_style = space
+indent_size = 2

.travis.yml

@@ -1,13 +1,16 @@
 language: node_js
 node_js:
   - "node"
+env:
+  - AWESOME_BOT='awesome_bot README.md --allow-dupe --allow-redirect' STRICT=true
+  - AWESOME_BOT='awesome_bot README.md --allow-dupe' STRICT=true
 install:
   - yarn
   - gem install awesome_bot
   - gem install danger
 script:
   - remark -f --no-stdout README.md
-  - awesome_bot README.md --allow-dupe --allow-redirect
+  - $AWESOME_BOT
   - danger
 notifications:
   email: false