Bump @babel/plugin-proposal-class-properties from 7.8.3 to 7.12.1

Bumps [@babel/plugin-proposal-class-properties](https://github.com/babel/babel/tree/HEAD/packages/babel-plugin-proposal-class-properties) from 7.8.3 to 7.12.1.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.12.1/packages/babel-plugin-proposal-class-properties)

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

Author: dependabot-preview[bot]

yarn.lock

@@ -348,12 +348,12 @@
     "@babel/plugin-syntax-async-generators" "^7.8.0"
 
 "@babel/plugin-proposal-class-properties@^7.1.0", "@babel/plugin-proposal-class-properties@^7.7.0", "@babel/plugin-proposal-class-properties@^7.8.3":
-  version "7.8.3"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-class-properties/-/plugin-proposal-class-properties-7.8.3.tgz#5e06654af5cd04b608915aada9b2a6788004464e"
-  integrity sha512-EqFhbo7IosdgPgZggHaNObkmO1kNUe3slaKu54d5OWvy+p9QIKOzK1GAEpAIsZtWVtPXUHSMcT4smvDrCfY4AA==
+  version "7.12.1"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-class-properties/-/plugin-proposal-class-properties-7.12.1.tgz#a082ff541f2a29a4821065b8add9346c0c16e5de"
+  integrity sha512-cKp3dlQsFsEs5CWKnN7BnSHOd0EOW8EKpEjkoz1pO2E5KzIDNV9Ros1b0CnmbVgAGXJubOYVBOGCT1OmJwOI7w==
   dependencies:
-    "@babel/helper-create-class-features-plugin" "^7.8.3"
-    "@babel/helper-plugin-utils" "^7.8.3"
+    "@babel/helper-create-class-features-plugin" "^7.12.1"
+    "@babel/helper-plugin-utils" "^7.10.4"
 
 "@babel/plugin-proposal-decorators@^7.7.0", "@babel/plugin-proposal-decorators@^7.8.3":
   version "7.12.12"