fix: webpack build

Author: Marsup

browser/webpack.config.js

@@ -46,9 +46,9 @@ module.exports = {
                             ]
                         ],
                         plugins: [
-                            '@babel/plugin-proposal-class-properties',
-                            '@babel/plugin-proposal-optional-chaining',
-                            '@babel/plugin-proposal-nullish-coalescing-operator',
+                            '@babel/plugin-transform-class-properties',
+                            '@babel/plugin-transform-optional-chaining',
+                            '@babel/plugin-transform-nullish-coalescing-operator',
                         ]
                     }
                 }