[new release] tyxml-ppx and tyxml (4.3.0)

CHANGES:

* Dunify
  This also removes all the deprecated libraries (`tyxml.syntax`, `tyxml.parser`)
  and removes the ocamlfind library `tyxml.ppx` in favor of `tyxml-ppx`.
  (ocsigen/tyxml#197 by Drup, Rudi Grinberg and Anton Bachin)
* Add simplistic indentation for the Format-based printer (ocsigen/tyxml#187 by Drup)
* Allow the ppx to be used for more exotic tyxml instances, such
  as reactive elements (ocsigen/tyxml#200 by Drup)
* Add `Html.of_seq` and `Svg.of_seq`, which allow to easily import
  HTML parsed with markup in TyXML (ocsigen/tyxml#221 by Drup)

## Elements and attributes
* Add Html.txt and Svg.txt as an alias for `pcdata` (ocsigen/tyxml#222 by Drup)
* Add noopener link types (ocsigen/tyxml#198 by Jérôme Vouillon)
* Slightly relax dt content type (ocsigen/tyxml#193 by Anton Bachin)
* Add touch events (ocsigen/tyxml#211 by Malthe Borch)
* Fix handling of figcaption in the PPX (ocsigen/tyxml#219 by Drup)

Author: Drup

packages/tyxml-ppx/tyxml-ppx.4.3.0/opam

@@ -0,0 +1,40 @@
+opam-version: "2.0"
+maintainer: "[email protected]"
+homepage: "https://github.com/ocsigen/tyxml/"
+bug-reports: "https://github.com/ocsigen/tyxml/issues"
+doc: "https://ocsigen.org/tyxml/manual/"
+dev-repo: "git+https://github.com/ocsigen/tyxml.git"
+license: "LGPL-2.1 with OCaml linking exception"
+
+build: [
+  ["dune" "subst"] {pinned}
+  ["dune" "build" "-p" name "-j" jobs]
+  ["dune" "runtest" "-p" name "-j" jobs] {with-test}
+]
+
+depends: [
+  "ocaml" {>= "4.02"}
+  "dune" {build}
+  "alcotest" {with-test}
+  "tyxml"
+  "markup" {>= "0.7.2"}
+  "ppx_tools_versioned"
+]
+
+synopsis:"PPX that allows to write TyXML documents with the HTML syntax"
+description:"""
+
+```ocaml
+open Tyxml
+let%html to_ocaml = "<a href='ocaml.org'>OCaml!</a>"
+```
+
+The TyXML PPX is compatible with all TyXML instance, from textual trees
+to reactive virtual DOM trees.
+"""
+authors: "The ocsigen team"
+url {
+  src:
+    "https://github.com/ocsigen/tyxml/releases/download/4.3.0/tyxml-4.3.0.tbz"
+  checksum: "md5=fd834a567f813bf447cab5f4c3a723e2"
+}

packages/tyxml/tyxml.4.3.0/opam

@@ -0,0 +1,44 @@
+opam-version: "2.0"
+maintainer: "[email protected]"
+homepage: "https://github.com/ocsigen/tyxml/"
+bug-reports: "https://github.com/ocsigen/tyxml/issues"
+doc: "https://ocsigen.org/tyxml/manual/"
+dev-repo: "git+https://github.com/ocsigen/tyxml.git"
+license: "LGPL-2.1 with OCaml linking exception"
+
+build: [
+  ["dune" "subst"] {pinned}
+  ["dune" "build" "-p" name "-j" jobs]
+  ["dune" "runtest" "-p" name "-j" jobs] {with-test}
+]
+
+depends: [
+  "ocaml" {>= "4.02"}
+  "dune" {build}
+  "alcotest" {with-test}
+  "seq"
+  "uutf" {>= "1.0.0"}
+  "re" {>= "1.5.0"}
+]
+
+synopsis:"TyXML is a library for building correct HTML and SVG documents"
+description:"""
+TyXML provides a set of convenient combinators that uses the OCaml
+type system to ensure the validity of the generated documents. TyXML
+can be used with any representation of HTML and SVG: the textual one,
+provided directly by this package, or DOM trees (`js_of_ocaml-tyxml`)
+virtual DOM (`virtual-dom`) and reactive or replicated trees
+(`eliom`). You can also create your own representation and use it to
+instantiate a new set of combinators.
+
+```ocaml
+open Tyxml
+let to_ocaml = Html.(a ~a:[a_href "ocaml.org"] [txt "OCaml!"])
+```
+"""
+authors: "The ocsigen team"
+url {
+  src:
+    "https://github.com/ocsigen/tyxml/releases/download/4.3.0/tyxml-4.3.0.tbz"
+  checksum: "md5=fd834a567f813bf447cab5f4c3a723e2"
+}