Fix tests by using jest-babel

babel.config.js

@@ -0,0 +1,6 @@
+module.exports = {
+  presets: [
+    ['@babel/preset-env', { targets: { node: 'current' } }],
+    '@babel/preset-typescript',
+  ],
+};

jest.config.js

@@ -1,5 +1,21 @@
 /** @type {import('ts-jest/dist/types').InitialOptionsTsJest} */
 module.exports = {
+    transform: {
+      "^.+\\.tsx?$": "ts-jest",
+      "^.+\\.[t|j]sx?$": "babel-jest", // Use Babel for transforming JS and TS files
+      "^.+\\.mjs$": "jest-transform-stub",  // Use the stub to handle ES modules
+    },
     preset: 'ts-jest',
     testEnvironment: 'node',
+    moduleNameMapper: {
+      "^octokit$": "<rootDir>/node_modules/octokit/dist-bundle/index.js",
+      "^@github/dependency-submission-toolkit$": "<rootDir>/node_modules/@github/dependency-submission-toolkit/dist/index.js",
+    },
+    extensionsToTreatAsEsm: [".ts"],
+    transformIgnorePatterns: ["/node_modules/(?!(octokit|\\@github\\/dependency-submission-toolkit)/)"],  // Ensure octokit and @github/dependency-submission-toolkit are transformed
+    globals: {
+      "ts-jest": {
+        useESM: true,
+      },
+    },
   };