Update the travis build to work in stages (#948)

* Update the travis build to work in stages

* Intentional "Build website" error

* Intentional "Lint" error

* Restore CI test errors

* Conditional deplay stage, only on master

So PRs targetting develop don't run an empty stage.

Related Travis Documentation:
https://docs.travis-ci.com/user/conditional-builds-stages-jobs/

.travis.yml

@@ -1,17 +1,25 @@
-matrix:
+jobs:
   include:
-    - language: node_js
+    - stage: "Test"
-      node_js:
+      name: "Lint"
-        - "8"
+      language: node_js
-
+      node_js: 8
       script:
         - npm run jsonlint
         - npm run svglint
+    - name: "Build website"
+      language: ruby
+      rvm: 2.4.1
+      install:
+        - gem install jekyll
+      script:
+        - jekyll build
 
-      notifications:
+    - stage: deploy
-        email:
+      name: "NPM Package"
-          on_success: never
+      language: node_js
-          on_failure: change
+      node_js: 8
+      if: branch = master
 
       deploy:
         provider: npm
@@ -20,17 +28,7 @@ matrix:
         on:
           branch: master
 
-    - language: ruby
+notifications:
-      rvm:
+  email:
-        - 2.4.1
+    on_success: never
-
+    on_failure: change
-      install:
-        - gem install jekyll
-
-      script:
-        - jekyll build
-
-      notifications:
-        email:
-          on_success: never
-          on_failure: change