Bump webpack from 4.39.2 to 4.39.3

Bumps [webpack](https://github.com/webpack/webpack) from 4.39.2 to 4.39.3.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](webpack/webpack@v4.39.2...v4.39.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

yarn.lock

@@ -5219,9 +5219,9 @@ webpack-sources@^1.4.0, webpack-sources@^1.4.1:
     source-map "~0.6.1"
 
 webpack@^4.36.1:
-  version "4.39.2"
-  resolved "https://registry.yarnpkg.com/webpack/-/webpack-4.39.2.tgz#c9aa5c1776d7c309d1b3911764f0288c8c2816aa"
-  integrity sha512-AKgTfz3xPSsEibH00JfZ9sHXGUwIQ6eZ9tLN8+VLzachk1Cw2LVmy+4R7ZiwTa9cZZ15tzySjeMui/UnSCAZhA==
+  version "4.39.3"
+  resolved "https://registry.yarnpkg.com/webpack/-/webpack-4.39.3.tgz#a02179d1032156b713b6ec2da7e0df9d037def50"
+  integrity sha512-BXSI9M211JyCVc3JxHWDpze85CvjC842EvpRsVTc/d15YJGlox7GIDd38kJgWrb3ZluyvIjgenbLDMBQPDcxYQ==
   dependencies:
     "@webassemblyjs/ast" "1.8.5"
     "@webassemblyjs/helper-module-context" "1.8.5"