feat(ci): Define linting stage for travis

.travis.yml

@@ -23,6 +23,9 @@ before_script:
 
 jobs:
   include:
+    - stage: Lint javaScript
+      script: npm run lint
+
     - stage: Unit and Integration tests
       script: npm test
 

package.json

@@ -18,9 +18,7 @@
     "seed:auth-user": "cross-env DEBUG=fcc:* node ./tools/scripts/seed/seedAuthUser",
     "seed:challenges": "cross-env DEBUG=fcc:* node ./tools/scripts/seed/seedChallenges",
     "postinstall": "npm run bootstrap",
-    "pretest": "npm-run-all -s test:lint",
     "test": "npm-run-all -p test:*",
-    "test:challenge-formatting": "node ./tools/scripts/ci/ensure-challenge-formatting.js",
     "test:client": "cd ./client && npm test && cd ../",
     "test:curriculum": "cd ./curriculum && npm test && cd ../",
     "test:guide-formatting": "node ./tools/scripts/ci/ensure-guide-formatting.js",