Merge pull request #6 from symfony/babel-properties

Add explicit dependency on @babel/plugin-proposal-class-properties

Author: tgalopin

package.json

@@ -16,6 +16,7 @@
         "stimulus": "^2.0"
     },
     "dependencies": {
+        "@babel/plugin-proposal-class-properties": "^7.12.1",
         "webpack-virtual-modules": "^0.3.2"
     },
     "devDependencies": {