Merge pull request #3243 from TracksApp/dependabot/bundler/mocha-3.1.0

Bump mocha from 3.0.2 to 3.1.0

Author: ZeiP

Gemfile.lock

@@ -227,7 +227,7 @@ GEM
       libv8-node (~> 24.12.0.1)
     minitest (5.27.0)
     minitest-stub-const (0.6)
-    mocha (3.0.2)
+    mocha (3.1.0)
       ruby2_keywords (>= 0.0.5)
     mysql2 (0.5.7)
       bigdecimal