Fixed Jest tests

Author: georgemoscu

babel.config.js

@@ -13,8 +13,5 @@
 
 module.exports = {
     presets: [['@babel/preset-env', {targets: {node: 'current'}}], '@babel/preset-typescript'],
-    plugins: [
-        ['@babel/plugin-proposal-decorators', {legacy: true}],
-        ['@babel/plugin-proposal-class-properties', {loose: true}],
-    ],
+    plugins: ['transform-decorators-legacy', 'transform-class-properties'],
 };