Removed osx image specifier

Simon Hofmann · Simon Hofmann · commit 111d8fed8d09 · 2019-09-24T16:24:05.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -7,17 +7,14 @@ matrix:
     - os: linux
       node_js: "10"
     - os: osx
-      osx_image: xcode11
       node_js: "10"
     - os: linux
       node_js: "11"
     - os: osx
-      osx_image: xcode11
       node_js: "11"
     - os: linux
       node_js: "12"
     - os: osx
-      osx_image: xcode11
       node_js: "12"
 
 addons:
