Add npm run test-only script for development

Difference between `npm test` and `npm run test-only`:

- `npm test` - run linting before testing
- `npm run test-only - without linting

Example:

```console
$ npm run test-only -- cli
...
 PASS  lib/__tests__/cli.test.mjs
 PASS  lib/utils/__tests__/checkInvalidCLIOptions.test.js
...
```

package.json

@@ -47,6 +47,7 @@
     "pretest": "npm run lint",
     "test": "node --experimental-vm-modules node_modules/jest/bin/jest.js",
     "test-coverage": "npm test --ignore-scripts -- --coverage",
+    "test-only": "npm test --ignore-scripts",
     "version": "changeset version",
     "postversion": "git restore package.json",
     "watch": "npm test --ignore-scripts -- --watch",