Merge pull request #388 from nexB/fix-travis

Update to Xenial ubuntu for linux tests

Author: steven-esser

.travis.yml

@@ -1,6 +1,6 @@
 language: node_js
 sudo: required
-dist: precise
+dist: xenial
 
 node_js:
   - "10"
@@ -15,7 +15,7 @@ matrix:
           python: 2.7.13
         - os: osx
           language: generic
-          osx_image: xcode7.3
+          osx_image: xcode11
 
 
 before_install: