chore(package): update @types/mocha to version 7.0.1

Closes #78

Author: greenkeeper[bot]

package.json

@@ -16,7 +16,7 @@
     "@types/chai": "^4.1.7",
     "@types/lodash": "^4.14.123",
     "@types/lolex": "^3.1.1",
-    "@types/mocha": "^5.2.6",
+    "@types/mocha": "^7.0.1",
     "@types/sinon": "^7.0.11",
     "@types/sinon-chai": "^3.2.2",
     "chai": "^4.2.0",