chore(travis): Also generate docs

Author: christopherthielen

.travis.yml

@@ -1,11 +1,11 @@
 language: node_js
 node_js: 8.9.1
-before_install: 
+before_install:
 - sh -e /etc/init.d/xvfb start
 - yarn global add greenkeeper-lockfile@1 yalc
 install: yarn --check-files
 before_script: greenkeeper-lockfile-update && greenkeeper-lockfile-upload
-script: if [ "x${DOWNSTREAM_PKGS}x" != "xx" ] ; then npm run test:downstream ; else tsc && npm test ; fi
+script: if [ "x${DOWNSTREAM_PKGS}x" != "xx" ] ; then npm run test:downstream ; else tsc && npm test && npx generate_docs; fi
 env:
   global:
     secure: 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