Fix unit tests (#5466)

Force merging to unblock build

Author: sebastianbenz

.babelrc

@@ -0,0 +1,7 @@
+{
+  "env": {
+    "test": {
+      "plugins": ["@babel/plugin-transform-modules-commonjs"]
+    }
+  }
+}

jest.config.js

@@ -151,7 +151,7 @@ module.exports = {
   // snapshotSerializers: [],
 
   // The test environment that will be used for testing
-  testEnvironment: 'node',
+  testEnvironment: 'jest-environment-node',
 
   // Options that will be passed to the testEnvironment
   // testEnvironmentOptions: {},
@@ -189,7 +189,7 @@ module.exports = {
   // timers: "real",
 
   // A map from regular expressions to paths to transformers
-  // transform: null,
+  // transform: {},
 
   // An array of regexp pattern strings that are matched against all source file paths, matched files will skip transformation
   // transformIgnorePatterns: [