2.1.4

This is the release of opam 2.1.4.

This minor release contains some fixes, please see blog post for upgrade instructions.

Binaries and full archive are signed by by opam dev team (fingerprint 92C5 26AE 50DF 3947 0EB2 911B ED4C F1CA 67CB AA92).

Changelog:

• Add support for OCaml 5.0. dose3 >= 6.1 and base64 >= 3.1.0 are now required [#5357 @kit-ty-kate @dra27 - fix #5354]
• [BUG] Fix all empty conflict explanation messages [#5378 @kit-ty-kate - partial fix #4373]