feat: fix abtestui overlay

.nvmrc

@@ -1 +1 @@
-v16.18.0
+v20

config/jest.config.js

@@ -1,6 +1,7 @@
 const path = require('path');
 
 module.exports = {
+  testEnvironment: "jsdom",
   collectCoverage: true,
   preset: 'ts-jest',
   rootDir: path.resolve(__dirname, '..'),

config/webpack.dev.js

@@ -29,7 +29,7 @@ module.exports = {
      }, {
       test: /\.css$/,
       use: [{
-        loader: 'css-to-string-loader'
+        loader: 'to-string-loader'
       }, {
         loader: 'css-loader'
       }]