Update dependency webpack to v4.29.3

Author: renovate-bot

fixtures/app/package.json

@@ -11,7 +11,7 @@
     "css-to-js-sourcemap-worker": "*"
   },
   "devDependencies": {
-    "webpack": "4.20.2",
+    "webpack": "4.29.3",
     "webpack-cli": "3.2.1"
   }
 }

worker/package.json

@@ -12,7 +12,7 @@
   "devDependencies": {
     "css-to-js-sourcemap-core": "*",
     "resolve-from": "4.0.0",
-    "webpack": "4.20.2",
+    "webpack": "4.29.3",
     "webpack-cli": "3.2.1"
   },
   "license": "MIT"