Bump min webpack version to 4.33.0 (#1874)

Fixes #1873

Author: MatthijsBurgh

package.json

@@ -45,7 +45,7 @@
  "through2-filter": "^3.0.0",
  "through2-map": "^3.0.0",
  "unzip-crx": "^0.2.0",
- "webpack": "^4.18.0",
+ "webpack": "^4.33.0",
  "webpack-chain": "^6.0.0",
  "webpack-merge": "^4.2.2",
  "yargs": "^17.5.1"

yarn.lock

@@ -17631,7 +17631,7 @@ webpack-sources@^3.2.3:
  resolved "https://registry.yarnpkg.com/webpack-sources/-/webpack-sources-3.2.3.tgz#2d4daab8451fd4b240cc27055ff6a0c2ccea0cde"
  integrity sha512-/DyMEOrDgLKKIG0fmvtz+4dUX/3Ghozwgm6iPp8KRhvn+eQf9+Q7GWxVNMk3+uCPWfdXYC4ExGBckIXdFEfH1w==
 
-webpack@^4.0.0, webpack@^4.18.0, webpack@^4.8.1:
+webpack@^4.0.0, webpack@^4.33.0, webpack@^4.8.1:
  version "4.46.0"
  resolved "https://registry.yarnpkg.com/webpack/-/webpack-4.46.0.tgz#bf9b4404ea20a073605e0a011d188d77cb6ad542"
  integrity sha512-6jJuJjg8znb/xRItk7bkT0+Q7AHCYjjFnvKIWQPkNIOyRqoCGvkOs0ipeQzrqz4l5FtN5ZI/ukEHroeX/o1/5Q==