Delete lexer tests (obsolete)
Commit lexer
Relayout test. Fix Cabal test.
Support nested comments
Improve indentation lexer
Fix strings lexing
Fix digits lexing
Use Kotlin function reference
Support TH quotation. See #15
Add normal field for executable name. #18
Add operators support
Add lexems
Highlight ":" as constructor.
Support escape from standard #30
as, qualified and hiding not keywords
Fix parser
Highlight "as" "qualified" and "hiding" again. Fix #17
Fix compilation
Fix installation
Fix #20