chore(package): update mocha to version 7.1.1

Closes #76

Author: greenkeeper[bot]

package.json

@@ -98,7 +98,7 @@
     "ember-resolver": "^2.0.3",
     "eslint-config-ticketfly-base": "^1.2.0",
     "loader.js": "^4.0.10",
-    "mocha": "^3.2.0",
+    "mocha": "^7.1.1",
     "postcss-cli": "^2.6.0",
     "postcss-custom-properties": "^5.0.1",
     "postcss-discard-comments": "^2.0.4",