Bump @types/node from 12.0.8 to 12.6.8 (#163)

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 12.0.8 to 12.6.8.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

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

package.json

@@ -73,7 +73,7 @@
     "@types/mime": "^2.0.0",
     "@types/mocha": "^5.2.5",
     "@types/mustache": "^0.8.32",
-    "@types/node": "^12.0.4",
+    "@types/node": "^12.6.8",
     "@types/semver": "^6.0.0",
     "@types/sha1": "^1.1.1",
     "builder-util-runtime": "^8.2.5",