Target newer frameworks

This release includes binaries for newer frameworks. The library now works on 4.x, 5.x, 6.x, and 7.x.

Bug fix: skippable items

This release fixes a bug in the GrammarCompiler that was producing incorrect node connections for subsequent skippable expression items, e.g. x = '[' 'a'? 'b'? ']';.

Initial release

This is the first official release. Of note, recent improvements include the ability to import definitions from one grammar file to another.