update travis to run coveralls

Suchita Doshi · Suchita Doshi · commit ab2959869486 · 2019-12-23T19:28:27.000-08:00
diff --git a/.travis.yml b/.travis.yml
@@ -19,4 +19,7 @@ install:
   - yarn install
 
 script:
-  - yarn test
+  - yarn test
+
+after_success:
+  - yarn coveralls
