[new release] mdx (2.1.0)

CHANGES:

#### Added

- Add support for adding language tags and metadata labels in `mli` files.
  (realworldocaml/mdx#339, realworldocaml/mdx#357, @Julow, @Leonidas-from-XIV)
- Add support for running non-deterministic tests in `dune` MDX 0.2 stanza by
  setting the `MDX_RUN_NON_DETERMINISTIC` environment variable. (realworldocaml/mdx#365,
  realworldocaml/mdx#366, @Leonidas-from-XIV)

packages/mdx/mdx.2.1.0/opam

@@ -0,0 +1,60 @@
+opam-version: "2.0"
+synopsis: "Executable code blocks inside markdown files"
+description: """
+`ocaml-mdx` allows to execute code blocks inside markdown files.
+There are (currently) two sub-commands, corresponding
+to two modes of operations: pre-processing (`ocaml-mdx pp`)
+and tests (`ocaml-mdx test`).
+
+The pre-processor mode allows to mix documentation and code,
+and to practice "literate programming" using markdown and OCaml.
+
+The test mode allows to ensure that shell scripts and OCaml fragments
+in the documentation always stays up-to-date."""
+maintainer: ["Thomas Gazagnaire <[email protected]>"]
+authors: ["Thomas Gazagnaire <[email protected]>"]
+license: "ISC"
+homepage: "https://github.com/realworldocaml/mdx"
+bug-reports: "https://github.com/realworldocaml/mdx/issues"
+depends: [
+  "dune" {>= "2.7"}
+  "ocaml" {>= "4.08.0"}
+  "ocamlfind"
+  "fmt" {>= "0.8.7"}
+  "cppo" {build & >= "1.1.0"}
+  "csexp" {>= "1.3.2"}
+  "astring"
+  "logs" {>= "0.7.0"}
+  "cmdliner" {>= "1.0.0"}
+  "re" {>= "1.7.2"}
+  "result"
+  "ocaml-version" {>= "2.3.0"}
+  "odoc-parser" {>= "1.0.0"}
+  "lwt" {with-test}
+  "alcotest" {with-test}
+  "odoc" {with-doc}
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
+dev-repo: "git+https://github.com/realworldocaml/mdx.git"
+url {
+  src:
+    "https://github.com/realworldocaml/mdx/releases/download/2.1.0/mdx-2.1.0.tbz"
+  checksum: [
+    "sha256=a25d73cbc2ce0c361d727bff8c1c84d299ea279ba342e3002eadeff72eed77fa"
+    "sha512=05e86a3a4513299433583b8c7cd482edfc513b08002825ae8ec390e537139eb7dd7b9131679d181e62147f9ff0d1814a1936d2e2983fc7530dcb85e347d4b603"
+  ]
+}
+x-commit-hash: "ac63819b1dcac3ea0246ffe74adffb39cccc77f6"