🔧 Update .travis.yml

Add before_script with setting a fake github global username and email to avoid the warning output at the CI build

Signed-off-by: Carlos Cuesta <carloscuesta@me.com>

Author: carloscuesta

.travis.yml

@@ -2,6 +2,9 @@ language: node_js
 node_js:
 - '6'
 - '4'
+before_script:
+- git config user.name "Travis CI"
+- git config user.email "mail@mail.com"
 cache:
   yarn: true
   directories: