std.Build.path function in build.zig

[FObersteiner]

Hi there :) Just stumbled across this; your library (which is quiet fun to play with!) is not using std.Build.pah function yet. Instead, the build.zig uses the now (as of Zig 0.12) deprecated .root_source_file = .{ .path =... syntax.

If you use .root_source_file = b.path("path-to-.zig") that works with 0.12 and 0.13-dev.