Deployの際に01 ERROR in ./app/javascript/packs/application.js 01 Module build failed (from ./node_modules/babel-loader/lib/index.js): 01 Error: Cannot find package '@babel/plugin-proposal-private-methods' imported from

package.jsonとbabel.config.jsの下記proposalの部分をtransformに書き換え

- @babel/plugin-proposal-private-methods
+ @babel/plugin-transform-private-methods
- @babel/plugin-proposal-private-property-in-object
+ @babel/plugin-transform-private-property-in-object