I found a bug in 0.2.0 and 0.3.0, which is addressed by the 0.3.1 which is now available in opam. The changes are:
- Fix accidental shadowing of open from another interface-less module using
ppx_regexp. - Support binding of group 0 and the universal pattern.
- Switch to ppx_tools_versioned. This provides support for 4.02.3 in the
main branch.