chore: add types test to travis

Ovyerus · Ovyerus · commit 2c224c6e8079 · 2019-04-20T15:43:57.000+10:00
diff --git a/.travis.yml b/.travis.yml
@@ -8,3 +8,6 @@ node_js:
   - '8.6'
   - '10'
   - '9'
+script:
+  - npm test
+  - npm run test:types
