build: update terser to version 4.4.0

Author: renovate-bot

packages/angular_devkit/build_angular/package.json

@@ -59,7 +59,7 @@
     "stylus": "0.54.7",
     "stylus-loader": "3.0.2",
     "tree-kill": "1.2.1",
-    "terser": "4.3.9",
+    "terser": "4.4.0",
     "terser-webpack-plugin": "2.2.1",
     "webpack": "4.41.2",
     "webpack-dev-middleware": "3.7.2",