chore(deps): update dependency standard-version to v4.4.0

Author: renovate-bot

package-lock.json

@@ -61,7 +61,7 @@
     "rollup-plugin-uglify": "3.0.0",
     "rxjs": "6.4.0",
     "tsickle": "^0.34.0",
-    "standard-version": "4.3.0",
+    "standard-version": "4.4.0",
     "systemjs": "0.21.0",
     "tslint": "5.9.1",
     "typescript": "3.2.4",