chore: babel loose mode config additions

this lets `npx jest-codemods` run

Author: mikehardy

babel.config.js

@@ -14,5 +14,9 @@ module.exports = {
       ],
     },
   },
-  plugins: [['@babel/plugin-proposal-private-property-in-object', { loose: true }]],
+  plugins: [
+    ['@babel/plugin-proposal-private-property-in-object', { loose: true }],
+    ['@babel/plugin-proposal-class-properties', { loose: true }],
+    ['@babel/plugin-proposal-private-methods', { loose: true }],
+  ],
 };