Bump @types/mocha from 5.2.6 to 5.2.7

Bumps [@types/mocha](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/mocha) from 5.2.6 to 5.2.7.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/mocha)

Author: dependabot-preview[bot]

package-lock.json

@@ -44,7 +44,7 @@
     "vscode-languageclient": "~5.2.1"
   },
   "devDependencies": {
-    "@types/mocha": "~5.2.6",
+    "@types/mocha": "~5.2.7",
     "@types/node": "~12.0.2",
     "@types/rewire": "^2.5.28",
     "mocha": "~5.2.0",