chore(deps): update dependency mocha to v3.5.2

Author: renovate[bot]

package.json

@@ -48,7 +48,7 @@
     "generate-changelog": "1.4.0",
     "hubot-test-helper": "1.7.0",
     "istanbul": "0.4.5",
-    "mocha": "3.5.1",
+    "mocha": "3.5.2",
     "proxyquire": "1.8.0"
   }
 }

yarn.lock

@@ -1101,9 +1101,9 @@ [email protected], [email protected]:
   dependencies:
     minimist "0.0.8"
 
-[email protected].1:
-  version "3.5.1"
-  resolved "https://registry.yarnpkg.com/mocha/-/mocha-3.5.1.tgz#9b6d13ac1ccf957edd16f2e439055734b1b60391"
+[email protected].2:
+  version "3.5.2"
+  resolved "https://registry.yarnpkg.com/mocha/-/mocha-3.5.2.tgz#3d5585cc6bd9e43a7c0bd251631abc0fbea0f032"
   dependencies:
     browser-stdout "1.3.0"
     commander "2.9.0"