feat: upgrade commitlint dependencies to v9

BREAKING CHANGE: this includes breaking changes from commitlint v9,
like the fact that `improvement` type is now rejected in `@commitlint/config-conventional`.

Author: wagoid

jest.config.js

@@ -1,9 +1,5 @@
-// For a detailed explanation regarding each configuration property, visit:
-// https://jestjs.io/docs/en/configuration.html
-
 module.exports = {
   // Automatically clear mock calls and instances between every test
   clearMocks: true,
-  // The test environment that will be used for testing
-  testEnvironment: 'node',
+  testEnvironment: '@commitlint/test-environment',
 }