build(deps-dev): bump @types/node from 12.0.12 to 12.6.8

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 12.0.12 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

@@ -51,7 +51,7 @@
     "@schematics/angular": "^8.0.2",
     "@types/jasmine": "^3.3.13",
     "@types/jasminewd2": "^2.0.6",
-    "@types/node": "^12.0.12",
+    "@types/node": "^12.6.8",
     "@types/parse5": "^5.0.0",
     "angular-cli-ghpages": "^0.5.3",
     "codelyzer": "~5.1.0",