build(typescript): refactoring project with typescript and test setup

jest.config.js

@@ -0,0 +1,18 @@
+const processStdoutWrite = process.stdout.write.bind(process.stdout)
+process.stdout.write = (str, encoding, cb) => {
+  if (!str.match(/^##/)) {
+    return processStdoutWrite(str, encoding, cb)
+  }
+  return false
+}
+
+module.exports = {
+  clearMocks: true,
+  moduleFileExtensions: ['js', 'ts'],
+  testEnvironment: 'node',
+  testMatch: ['**/*.test.ts'],
+  transform: {
+    '^.+\\.ts$': 'ts-jest',
+  },
+  verbose: true,
+}