Travis CI now on Linux & macOS ("osx")

Christopher J. Brody · Christopher J. Brody · commit d06078f9e727 · 2019-09-26T11:01:05.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -10,6 +10,10 @@ node_js:
   - 10
   - 12
 
+os:
+  - linux
+  - osx
+
 install:
   - nvm --version
   - node --version
