Use Terser

Author: Ives van Hoorne

packages/app/package.json

@@ -3,6 +3,9 @@
   "version": "0.1.1",
   "license": "MIT",
   "private": true,
+  "resolutions": {
+    "uglify-es": "npm:terser"
+  },
   "scripts": {
     "start": "cross-env LOCAL_SERVER=1 node scripts/start.js",
     "start:sandbox": "cross-env SANDBOX_ONLY=true node scripts/start.js",
@@ -81,6 +84,7 @@
     "strip-ansi": "3.0.1",
     "style-loader": "^0.21.0",
     "sw-precache-webpack-plugin": "^0.11.5",
+    "terser": "^3.8.0",
     "typescript": "^2.4.2",
     "uglifyjs-webpack-plugin": "^1.2.5",
     "url-loader": "1.0.1",

yarn.lock

@@ -4352,18 +4352,14 @@ [email protected], [email protected]:
   dependencies:
     graceful-readlink ">= 1.0.0"
 
-commander@^2.14.1, commander@^2.9.0:
+commander@^2.14.1, commander@^2.9.0, commander@~2.16.0:
   version "2.16.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.16.0.tgz#f16390593996ceb4f3eeb020b31d78528f7f8a50"
 
 commander@~2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.1.0.tgz#d121bbae860d9992a3d517ba96f56588e47c6781"
 
-commander@~2.13.0:
-  version "2.13.0"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-2.13.0.tgz#6964bca67685df7c1f1430c584f07d7597885b9c"
-
 commander@~2.8.1:
   version "2.8.1"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.8.1.tgz#06be367febfda0c330aa1e2a072d3dc9762425d4"
@@ -17244,7 +17240,7 @@ source-map-support@^0.4.0, source-map-support@^0.4.15, source-map-support@^0.4.4
   dependencies:
     source-map "^0.5.6"
 
-source-map-support@^0.5.0, source-map-support@^0.5.3, source-map-support@^0.5.5:
+source-map-support@^0.5.0, source-map-support@^0.5.3, source-map-support@^0.5.5, source-map-support@~0.5.6:
   version "0.5.6"
   resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.6.tgz#4435cee46b1aab62b8e8610ce60f788091c51c13"
   dependencies:
@@ -18125,6 +18121,14 @@ tern@^0.21.0:
     minimatch "^3.0.3"
     resolve-from "2.0.0"
 
+terser@^3.8.0, uglify-es@^3.3.4, uglify-es@^3.3.7, uglify-es@^3.3.9, "uglify-es@npm:terser":
+  version "3.8.0"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-3.8.0.tgz#66a4f4f500d2c829faab840f318c49cc471d73ae"
+  dependencies:
+    commander "~2.16.0"
+    source-map "~0.6.1"
+    source-map-support "~0.5.6"
+
 test-exclude@^4.2.1:
   version "4.2.1"
   resolved "https://registry.yarnpkg.com/test-exclude/-/test-exclude-4.2.1.tgz#dfa222f03480bca69207ca728b37d74b45f724fa"
@@ -18710,13 +18714,6 @@ ua-parser-js@^0.7.18, ua-parser-js@^0.7.9:
   version "0.7.18"
   resolved "https://registry.yarnpkg.com/ua-parser-js/-/ua-parser-js-0.7.18.tgz#a7bfd92f56edfb117083b69e31d2aa8882d4b1ed"
 
-uglify-es@^3.3.4, uglify-es@^3.3.7, uglify-es@^3.3.9:
-  version "3.3.9"
-  resolved "https://registry.yarnpkg.com/uglify-es/-/uglify-es-3.3.9.tgz#0c1c4f0700bed8dbc124cdb304d2592ca203e677"
-  dependencies:
-    commander "~2.13.0"
-    source-map "~0.6.1"
-
 [email protected]:
   version "3.3.28"
   resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.3.28.tgz#0efb9a13850e11303361c1051f64d2ec68d9be06"