Rewriter v0.0.5

A pre-release tag for use with Fiat Cryptography v0.0.15 and a non-dev opam package.

Reification now uses Ltac2, and so we only support Coq >= 8.15

What's Changed

• Use $$ instead of $ to avoid Ltac2 conflict by @JasonGross in #55
• Port reification to Ltac2 by @JasonGross in #57
• Adapt w.r.t. coq/coq#16488. by @ppedrot in #59
• Remove accidental duplication of ml code by @JasonGross in #60
• Make debugging of rewriting example a bit easier by @JasonGross in #61
• Add some Ltac2 util and fix some Ltac2 debug functions by @JasonGross in #63
• Add Ltac2 util and clean up old version cruft by @JasonGross in #65
• More Ltac2 Util by @JasonGross in #66
• Port rewrite rule reification to Ltac2 for improved performance by @JasonGross in #62

Full Changelog: v0.0.4...v0.0.5