[ANN] DkML 2.1.2 and opam 2.2.0

[jbeckford]

DkML 2.1.3 was released. The major changes are:

• Upgraded from opam 2.2.0 to opam 2.2.1.

• The ocaml/opam-repository tag was advanced to Sep 10, 2024.

• bugfix: dk Ml.Switch init was broken on Linux and macOS. DkML 2.1.2 had incorrectly pinned the dkml-host-abi and dkml-target-abi of the master DkML build machine. https://gitlab.com/dkml/distributions/dkml/-/issues/24

• Allow prereleases of Visual Studio; requested at https://gitlab.com/dkml/distributions/dkml/-/issues/23.

Upgrading is:

winget remove dkml # Ignore "exit code: 4294967295"
winget install dkml

The full release notes are at DkML 2.1.3 · DkML / Distributions / DkML · GitLab.