0.1.0

The first proper release of Zig Javascript Bridge. There's not really a reason I haven't done a release before. However recent changes added zjb.ConstHandle and exporting functions with zjb.Handle arguments. See the updated readme for usage.

This is considered 0.1.0 and not a 1.0.0 release only because there has yet to be high usage, so confidence that no major API changes will need to be made is low.