fix(cli): catalogsMergePath doesn't merge catalogs

[Martin005]

This PR fixes #1233.
Previously, the catalogs were not merge even if catalogsMergePath option was provided in the configuration. The getCatalogForMerge() function was never called from the code (it was used only in tests).

[vercel]

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Name	Status	Preview	Comments	Updated
js-lingui	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Jan 16, 2023 at 7:47PM (UTC)

[github-actions]

size-limit report 📦

Path	Size
./packages/core/build/cjs/core.production.min.js	2.87 KB (0%)
./packages/detect-locale/build/cjs/detect-locale.production.min.js	798 B (0%)
./packages/react/build/cjs/react.production.min.js	4.91 KB (0%)
./packages/remote-loader/build/cjs/remote-loader.production.min.js	17.56 KB (0%)

[timofei-iatsenko]

It should be automatically tested somehow. Could you create a test for that?

[Martin005]

It should be automatically tested somehow. Could you create a test for that?

There are already tests for getCatalogForMerge() function. As for testing the lingui-compile.ts file, we don't currently have tests for any of our CLI commands – maybe we could add tests in a separate PR.