Add webpack building, ESLint on PRs, and tag building to Travis (#911)

* Make Travis run ESLint before deploying

* Fix Travis never building docs for tags

* Update deploy.sh to also build the webpack

* Update deploy.sh

.travis.yml

@@ -5,7 +5,9 @@ cache:
   directories:
     - node_modules
 install: npm install
-script: bash ./docs/deploy/deploy.sh
+script:
+  - npm run test
+  - bash ./docs/deploy/deploy.sh
 env:
   global:
     - ENCRYPTION_LABEL: "af862fa96d3e"