chore(package): update @types/node to version 12.6.3

Closes #378

Author: greenkeeper[bot]

package.json

@@ -65,7 +65,7 @@
     "@angular/cli": "7.3.6",
     "@angular/compiler-cli": "7.1.3",
     "@types/jasmine": "3.3.12",
-    "@types/node": "12.0.1",
+    "@types/node": "12.6.3",
     "awesome-typescript-loader": "5.2.0",
     "codelyzer": "4.0.0",
     "cspell": "4.0.12",