Adding spaces around query to the grammar (#35)

upgrade golang to 1.21.0 (#34)

upgrading antlr runtime to github.com/antlr4-go/antlr (#33)

upgrade to depend on module antlr/v4 (#26)

Co-authored-by: Julian Danciu <[email protected]>

Upgrading antlr version

Switching to go modules and moving to github actions (#23)