Feat/add snowflake support (gretard#44)

* Add snowflake grammar support

* Update rule helper tool

* Update rules

* Cleanup

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Co-authored-by: gretard <gretard@users.noreply.github.com>

Cleanup

Prepare for release

Update for new release

Fix sql check issue

Update dependencies

Update dependencies for plugin to work with 8.9 LTS SonarQube version

Prepare for 1.2.0 release

Update README.md

Updates