Always force capture index into a string (#73)

Fix duplicated content in C++ grammar (#60)

* Add a test case

* Patch error in CPP grammar

* Fill out test

Don't tokenize empty/whitespace-only capture groups (#51)

* Remove an unused variable

* Skip over empty/whitespace-only capture groups

* Restore CPP sample

Remove PHP 8.2 from testing matrix

Format code

Add Antlers language (#47)

* Add Antlers language

* Add HTML include to workaround injection problems

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Co-authored-by: Ryan Chandler <ryangjchandler@gmail.com>

Add binary info to README

Assume txt if detected grammar is null (#42)

Add gutter toggle to sample playground

fix: dont assume that all themes will highlight a token