New package pattern.0.1.0 (#14146)
New package pattern.0.1.0 (#14146)

* New package pattern.0.1.0

pattern is a PPX extension that generates functions from patterns
that explain match failures by returning the common context and the
list of differences between a pattern and a value.

* Add build instruction!

* Remove reference to ppx_deriving

* Add ppx_deriving to dependencies

* Update dependencies in the ocaml repo

* Fix compatibility with old OCaml versions

andersfugmann/opam-repository,Leonidas-from-XIV/opam-repository,lefessan/opam-repository,abate/opam-repository,Leonidas-from-XIV/opam-repository,codinuum/opam-repository,mjambon/opam-repository,talex5/opam-repository,avsm/opam-repository,arlencox/opam-repository,emillon/opam-repository,dra27/opam-repository,jonludlam/opam-repository,AltGr/opam-repository,c-cube/opam-repository,jhwoodyatt/opam-repository,dbuenzli/opam-repository,seliopou/opam-repository,dra27/opam-repository,andersfugmann/opam-repository,dbuenzli/opam-repository,cakeplus/opam-repository,seliopou/opam-repository,orbitz/opam-repository,nberth/opam-repository,planar/opam-repository,djs55/opam-repository,fpottier/opam-repository,astrada/opam-repository,nberth/opam-repository,AltGr/opam-repository,toots/opam-repository,pqwy/opam-repository,astrada/opam-repository,fpottier/opam-repository,camlspotter/opam-repository,codinuum/opam-repository,Chris00/opam-repository,ocaml/opam-repository,hannesm/opam-repository,mjambon/opam-repository,pqwy/opam-repository,talex5/opam-repository,lefessan/opam-repository,kkirstein/opam-repository,djs55/opam-repository,yallop/opam-repository,hakuch/opam-repository,hannesm/opam-repository,Chris00/opam-repository,camlspotter/opam-repository,avsm/opam-repository,jonludlam/opam-repository,toots/opam-repository,gasche/opam-repository,ocaml/opam-repository,jhwoodyatt/opam-repository,kkirstein/opam-repository,pirbo/opam-repository,yallop/opam-repository,pirbo/opam-repository,c-cube/opam-repository,emillon/opam-repository