Bump deepmerge from 4.1.1 to 4.2.1

Bumps [deepmerge](https://github.com/TehShrike/deepmerge) from 4.1.1 to 4.2.1.
- [Release notes](https://github.com/TehShrike/deepmerge/releases)
- [Changelog](https://github.com/TehShrike/deepmerge/blob/master/changelog.md)
- [Commits](TehShrike/deepmerge@v4.1.1...v4.2.1)

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

yarn.lock

@@ -5899,9 +5899,9 @@ deepmerge@4.0.0:
   integrity sha512-YZ1rOP5+kHor4hMAH+HRQnBQHg+wvS1un1hAOuIcxcBy0hzcUf6Jg2a1w65kpoOUnurOfZbERwjI1TfZxNjcww==
 
 deepmerge@^4.0.0:
-  version "4.1.1"
-  resolved "https://registry.yarnpkg.com/deepmerge/-/deepmerge-4.1.1.tgz#ee0866e4019fe62c1276b9062d4c4803d9aea14c"
-  integrity sha512-+qO5WbNBKBaZez95TffdUDnGIo4+r5kmsX8aOb7PDHvXsTbghAmleuxjs6ytNaf5Eg4FGBXDS5vqO61TRi6BMg==
+  version "4.2.1"
+  resolved "https://registry.yarnpkg.com/deepmerge/-/deepmerge-4.2.1.tgz#018a3e5dfe82b95e35e36a9a29ba15ddb194e40f"
+  integrity sha512-32P7FIV6JKt0hPMFNlWFytzVGpppYHFKdnhFUEMXheWc8Lw4HnHEzJa5yxhaQedDAXv2SI6zD7+UbqnC5k9g9Q==
 
 default-gateway@^4.2.0:
   version "4.2.0"