Revert "[ci] use ocaml 5" (stay on ocaml 4 for now)

This reverts commit 3d8c248.

.github/workflows/main.yml

@@ -53,7 +53,7 @@ jobs:
       - name: Setup ocaml
         uses: ocaml/setup-ocaml@v2
         with:
-          ocaml-compiler: 5.0.0
+          ocaml-compiler: 4.08.1
           opam-repositories: |
             opam-repository-mingw: https://github.com/ocaml-opam/opam-repository-mingw.git#sunset
             default: https://github.com/ocaml/opam-repository.git
@@ -170,7 +170,7 @@ jobs:
         continue-on-error: true
         uses: kLabz/setup-ocaml@win32
         with:
-          ocaml-compiler: 5.0.0
+          ocaml-compiler: 4.08.1
           opam-depext: false
           opam-repositories: |
             opam-repository-mingw: https://github.com/ocaml-opam/opam-repository-mingw.git#sunset
@@ -185,7 +185,7 @@ jobs:
         if: steps.ocaml.outcome == 'failure'
         uses: kLabz/setup-ocaml@win32
         with:
-          ocaml-compiler: 5.0.0
+          ocaml-compiler: 4.08.1
           opam-depext: false
           opam-repositories: |
             opam-repository-mingw: https://github.com/ocaml-opam/opam-repository-mingw.git#sunset
@@ -303,7 +303,6 @@ jobs:
           set -ex
           opam init # --disable-sandboxing
           opam update
-          opam switch create 5.0.0
           opam pin add haxe . --no-action
           opam install haxe --deps-only --assume-depexts
           opam list
@@ -646,7 +645,7 @@ jobs:
           set -ex
           opam init # --disable-sandboxing
           opam update
-          opam switch create 5.0.0
+          opam switch create 4.08.1
           eval $(opam env)
           opam env
           opam pin add ctypes 0.17.1 --yes

haxe.opam

@@ -19,10 +19,10 @@ build: [
 install: [make "install" "INSTALL_DIR=%{prefix}%"]
 remove: [make "uninstall" "INSTALL_DIR=%{prefix}%"]
 depends: [
-  "ocaml" {>= "5.0"}
+  "ocaml" {>= "4.08"}
   "ocamlfind" {build}
   "dune" {>= "1.11"}
-  "camlp5"
+  "camlp5" {build & = "8.00"}
   "sedlex" {>= "2.0"}
   "xml-light"
   "extlib" {>= "1.7.8"}