Add babel plugin to workaround bug in @babel/preset-env (#45664)

babel.config.json

@@ -26,6 +26,9 @@
     ]
   ],
   "plugins": [
+    // added to mitigate https://github.com/babel/babel/issues/14289
+    // package (and following line) can be removed once the issue is fixed and released
+    "@babel/plugin-proposal-class-properties",
     [
       "@babel/plugin-transform-typescript",
       {

package.json

@@ -70,6 +70,7 @@
   },
   "devDependencies": {
     "@babel/core": "7.17.0",
+    "@babel/plugin-proposal-class-properties": "7.16.7",
     "@babel/plugin-proposal-nullish-coalescing-operator": "7.16.7",
     "@babel/plugin-proposal-object-rest-spread": "7.17.3",
     "@babel/plugin-proposal-optional-chaining": "7.16.7",

yarn.lock

@@ -1111,27 +1111,27 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@babel/plugin-proposal-class-properties@npm:^7.12.1, @babel/plugin-proposal-class-properties@npm:^7.13.0, @babel/plugin-proposal-class-properties@npm:^7.14.5":
+"@babel/plugin-proposal-class-properties@npm:7.16.7, @babel/plugin-proposal-class-properties@npm:^7.16.7":
-  version: 7.14.5
+  version: 7.16.7
-  resolution: "@babel/plugin-proposal-class-properties@npm:7.14.5"
+  resolution: "@babel/plugin-proposal-class-properties@npm:7.16.7"
   dependencies:
-    "@babel/helper-create-class-features-plugin": ^7.14.5
+    "@babel/helper-create-class-features-plugin": ^7.16.7
-    "@babel/helper-plugin-utils": ^7.14.5
+    "@babel/helper-plugin-utils": ^7.16.7
   peerDependencies:
     "@babel/core": ^7.0.0-0
-  checksum: fe2aa0a44f8ea121e10c856d6fb4fca418dc42451258ef6ed29321ca740080fba420ebd3d6700d0456c34c2ab2044f9ce4308498321f52a93184ff5adb015aae
+  checksum: 3977e841e17b45b47be749b9a5b67b9e8b25ff0840f9fdad3f00cbcb35db4f5ff15f074939fe19b01207a29688c432cc2c682351959350834d62920b7881f803
   languageName: node
   linkType: hard
 
-"@babel/plugin-proposal-class-properties@npm:^7.16.7":
+"@babel/plugin-proposal-class-properties@npm:^7.12.1, @babel/plugin-proposal-class-properties@npm:^7.13.0, @babel/plugin-proposal-class-properties@npm:^7.14.5":
-  version: 7.16.7
+  version: 7.14.5
-  resolution: "@babel/plugin-proposal-class-properties@npm:7.16.7"
+  resolution: "@babel/plugin-proposal-class-properties@npm:7.14.5"
   dependencies:
-    "@babel/helper-create-class-features-plugin": ^7.16.7
+    "@babel/helper-create-class-features-plugin": ^7.14.5
-    "@babel/helper-plugin-utils": ^7.16.7
+    "@babel/helper-plugin-utils": ^7.14.5
   peerDependencies:
     "@babel/core": ^7.0.0-0
-  checksum: 3977e841e17b45b47be749b9a5b67b9e8b25ff0840f9fdad3f00cbcb35db4f5ff15f074939fe19b01207a29688c432cc2c682351959350834d62920b7881f803
+  checksum: fe2aa0a44f8ea121e10c856d6fb4fca418dc42451258ef6ed29321ca740080fba420ebd3d6700d0456c34c2ab2044f9ce4308498321f52a93184ff5adb015aae
   languageName: node
   linkType: hard
 
@@ -20377,6 +20377,7 @@ __metadata:
   resolution: "grafana@workspace:."
   dependencies:
     "@babel/core": 7.17.0
+    "@babel/plugin-proposal-class-properties": 7.16.7
     "@babel/plugin-proposal-nullish-coalescing-operator": 7.16.7
     "@babel/plugin-proposal-object-rest-spread": 7.17.3
     "@babel/plugin-proposal-optional-chaining": 7.16.7