chore(travis): let travis build release tags

TheSharpieOne · TheSharpieOne · commit 9465670ff8f2 · 2018-06-28T12:53:03.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -21,6 +21,7 @@ env:
 branches:
   only:
   - master
+  - /^\d+\.\d+(\.\d+)?(-\S*)?$/
 before_deploy: 
   - "echo 'Preparing to publish'"
   - npm run build
