Bump @babel/plugin-proposal-class-properties from 7.5.5 to 7.7.0 (#12346)

Bumps [@babel/plugin-proposal-class-properties](https://github.com/babel/babel) from 7.5.5 to 7.7.0.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/compare/v7.5.5...v7.7.0)

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

package.json

@@ -60,7 +60,7 @@
   "private": true,
   "dependencies": {
     "@babel/core": "^7.4.5",
-    "@babel/plugin-proposal-class-properties": "^7.5.5",
+    "@babel/plugin-proposal-class-properties": "^7.7.0",
     "@babel/plugin-proposal-decorators": "^7.6.0",
     "@babel/plugin-proposal-object-rest-spread": "^7.6.2",
     "@babel/plugin-syntax-dynamic-import": "^7.2.0",

yarn.lock

@@ -131,17 +131,17 @@
     "@babel/traverse" "^7.4.4"
     "@babel/types" "^7.4.4"
 
-"@babel/helper-create-class-features-plugin@^7.5.5", "@babel/helper-create-class-features-plugin@^7.6.0":
-  version "7.6.0"
-  resolved "https://registry.yarnpkg.com/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.6.0.tgz#769711acca889be371e9bc2eb68641d55218021f"
-  integrity sha512-O1QWBko4fzGju6VoVvrZg0RROCVifcLxiApnGP3OWfWzvxRZFCoBD81K5ur5e3bVY2Vf/5rIJm8cqPKn8HUJng==
+"@babel/helper-create-class-features-plugin@^7.6.0", "@babel/helper-create-class-features-plugin@^7.7.0":
+  version "7.7.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.7.0.tgz#bcdc223abbfdd386f94196ae2544987f8df775e8"
+  integrity sha512-MZiB5qvTWoyiFOgootmRSDV1udjIqJW/8lmxgzKq6oDqxdmHUjeP2ZUOmgHdYjmUVNABqRrHjYAYRvj8Eox/UA==
   dependencies:
-    "@babel/helper-function-name" "^7.1.0"
-    "@babel/helper-member-expression-to-functions" "^7.5.5"
-    "@babel/helper-optimise-call-expression" "^7.0.0"
+    "@babel/helper-function-name" "^7.7.0"
+    "@babel/helper-member-expression-to-functions" "^7.7.0"
+    "@babel/helper-optimise-call-expression" "^7.7.0"
     "@babel/helper-plugin-utils" "^7.0.0"
-    "@babel/helper-replace-supers" "^7.5.5"
-    "@babel/helper-split-export-declaration" "^7.4.4"
+    "@babel/helper-replace-supers" "^7.7.0"
+    "@babel/helper-split-export-declaration" "^7.7.0"
 
 "@babel/helper-create-regexp-features-plugin@^7.7.0":
   version "7.7.0"
@@ -402,12 +402,12 @@
     "@babel/helper-remap-async-to-generator" "^7.7.0"
     "@babel/plugin-syntax-async-generators" "^7.2.0"
 
-"@babel/plugin-proposal-class-properties@^7.5.5":
-  version "7.5.5"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-class-properties/-/plugin-proposal-class-properties-7.5.5.tgz#a974cfae1e37c3110e71f3c6a2e48b8e71958cd4"
-  integrity sha512-AF79FsnWFxjlaosgdi421vmYG6/jg79bVD0dpD44QdgobzHKuLZ6S3vl8la9qIeSwGi8i1fS0O1mfuDAAdo1/A==
+"@babel/plugin-proposal-class-properties@^7.7.0":
+  version "7.7.0"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-class-properties/-/plugin-proposal-class-properties-7.7.0.tgz#ac54e728ecf81d90e8f4d2a9c05a890457107917"
+  integrity sha512-tufDcFA1Vj+eWvwHN+jvMN6QsV5o+vUlytNKrbMiCeDL0F2j92RURzUsUMWE5EJkLyWxjdUslCsMQa9FWth16A==
   dependencies:
-    "@babel/helper-create-class-features-plugin" "^7.5.5"
+    "@babel/helper-create-class-features-plugin" "^7.7.0"
     "@babel/helper-plugin-utils" "^7.0.0"
 
 "@babel/plugin-proposal-decorators@^7.6.0":