Bump semver from 5.4.1 to 5.7.2 in /fixtures/packaging/webpack/dev

Bumps [semver](https://github.com/npm/node-semver) from 5.4.1 to 5.7.2.
- [Release notes](https://github.com/npm/node-semver/releases)
- [Changelog](https://github.com/npm/node-semver/blob/v5.7.2/CHANGELOG.md)
- [Commits](https://github.com/npm/node-semver/compare/v5.4.1...v5.7.2)

---
updated-dependencies:
- dependency-name: semver
  dependency-version: 5.7.2
  dependency-type: indirect
...

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

fixtures/packaging/webpack/dev/yarn.lock

@@ -1050,8 +1050,8 @@ safe-buffer@^5.0.1, safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.1.tgz#893312af69b2123def71f57889001671eeb2c853"
 
 semver@^5.3.0:
-  version "5.4.1"
-  resolved "https://registry.yarnpkg.com/semver/-/semver-5.4.1.tgz#e059c09d8571f0540823733433505d3a2f00b18e"
+  version "5.7.2"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.2.tgz#48d55db737c3287cd4835e17fa13feace1c41ef8"
 
 set-blocking@~2.0.0:
   version "2.0.0"