* Migrated loki syntax and labels logic to useLokiSyntax hook
* Enable loki labels refresh after specified interval has passed
* Enable periodic loki labels refresh when labels selector is opened
* Fix prettier
* Add react-hooks-testing-library and disable lib check on typecheck
* Add tests for loki syntax/label hooks
* Move tsc's skipLibCheck option to tsconfig for webpack to pick it up
* Set log labels refresh marker variable when log labels fetch start
* Fix prettier issues
* Fix type on activeOption in useLokiLabel hook
* Typo fixes and types in useLokiSyntax hook test fixes
* Make sure effect's setState is not performed on unmounted component
* Extract logic for checking if is component mounted to a separate hook
