docs: deploy docs to github pages

Author: Adam Butterworth

.gitignore

@@ -4,4 +4,5 @@
 coverage
 dist
 node_modules
-/docs/_API-body.md
+/docs/api
+

.travis.yml

@@ -4,9 +4,18 @@ script:
   - npm run lint
   - npm run test
   - npm run build
+  - npm run docs
 after_success:
   - npx semantic-release
   - codecov
+deploy:
+  provider: pages
+  skip_cleanup: false
+  github_token: $GH_TOKEN
+  keep_history: true
+  local_dir: ./docs/api/@edx/frontend-platform/1.0.0-semantically-released
+  on:
+    branch: master
 env:
   global:
   # GH_TOKEN