chore: update jest.config.base to use ts-jest

Author: trivikr

jest.config.base.js

@@ -1,4 +1,5 @@
 module.exports = {
   // remove testMatch once we move to ts-jest
-  testMatch: ["**/__tests__/**/*.js?(x)", "**/dist/cjs/**/?(*.)+(spec|test).js?(x)"],
+  preset: "ts-jest",
+  testMatch: ["**/src/**/*.spec.ts"],
 };