build(deps-dev): Bump @typescript-eslint/parser from 2.6.1 to 2.7.0

Bumps [@typescript-eslint/parser](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/parser) from 2.6.1 to 2.7.0.
- [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases)
- [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/parser/CHANGELOG.md)
- [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v2.7.0/packages/parser)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -16,7 +16,7 @@
     "@types/sinon": "5.0.5",
     "@types/sinon-chai": "3.2.3",
     "@typescript-eslint/eslint-plugin": "~2.6.0",
-    "@typescript-eslint/parser": "~2.6.0",
+    "@typescript-eslint/parser": "~2.7.0",
     "acorn": "^7.0.0",
     "chai": "^4.1.1",
     "chai-as-promised": "^7.1.1",