chore(deps): bump webpack from 4.39.3 to 4.40.2 (#474)

Bumps [webpack](https://github.com/webpack/webpack) from 4.39.3 to 4.40.2.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](webpack/webpack@v4.39.3...v4.40.2)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

yarn.lock

@@ -16384,9 +16384,9 @@ webpack-sources@^1.1.0, webpack-sources@^1.4.0, webpack-sources@^1.4.1:
     source-map "~0.6.1"
 
 webpack@^4.0.0, webpack@^4.18.0, webpack@^4.8.1:
-  version "4.39.3"
-  resolved "https://registry.yarnpkg.com/webpack/-/webpack-4.39.3.tgz#a02179d1032156b713b6ec2da7e0df9d037def50"
-  integrity sha512-BXSI9M211JyCVc3JxHWDpze85CvjC842EvpRsVTc/d15YJGlox7GIDd38kJgWrb3ZluyvIjgenbLDMBQPDcxYQ==
+  version "4.40.2"
+  resolved "https://registry.yarnpkg.com/webpack/-/webpack-4.40.2.tgz#d21433d250f900bf0facbabe8f50d585b2dc30a7"
+  integrity sha512-5nIvteTDCUws2DVvP9Qe+JPla7kWPPIDFZv55To7IycHWZ+Z5qBdaBYPyuXWdhggTufZkQwfIK+5rKQTVovm2A==
   dependencies:
     "@webassemblyjs/ast" "1.8.5"
     "@webassemblyjs/helper-module-context" "1.8.5"