Update Jest config to map next export to source correctly

Author: Gudahtt

jest.config.packages.js

@@ -80,6 +80,9 @@ module.exports = {
   // Here we ensure that Jest resolves `@metamask/*` imports to the uncompiled source code for packages that live in this repo.
   // NOTE: This must be synchronized with the `paths` option in `tsconfig.packages.json`.
   moduleNameMapper: {
+    '^@metamask/base-controller/next': [
+      '<rootDir>/../base-controller/src/next',
+    ],
     '^@metamask/(.+)$': [
       '<rootDir>/../$1/src',
       // Some @metamask/* packages we are referencing aren't in this monorepo,

tsconfig.packages.json

@@ -13,6 +13,7 @@
      * `jest.config.packages.js`.
      */
     "paths": {
+      "@metamask/base-controller/next": ["../base-controller/src/next"],
       "@metamask/*": ["../*/src"]
     },
     "strict": true,