(Feature) Add checks into CI (#594)

.travis.yml

@@ -27,6 +27,8 @@ before_install:
   # Install truffle
   - yarn global add truffle
 script:
+  - yarn lint:check
+  - yarn prettier:check
   - yarn build
 after_success:
   - |
@@ -80,4 +82,4 @@ deploy:
 - provider: script
   script: bash config/travis/prepare_production_deployment.sh
   on:
-    tags: true
+    tags: true