update travis.yml

.travis.yml

@@ -9,9 +9,10 @@ before_install:
   - gem install danger
 
 before_script:
-  - git diff master.. -U0 README.md | grep -Po "(?<=^\+).*" >> temp.md
   
 script:
+  allow_failures:
+    - git diff master.. -U0 README.md | grep -Po "(?<=^\+).*" >> temp.md
   - node test.js temp.md
   - awesome_bot temp.md --allow-redirect
   - danger --verbose