Update ci

.github/workflows/ci.yml

@@ -1,58 +1,37 @@
-name: Basic CI
+name: Builds, tests & co
 
 on:
-  - pull_request
   - push
+  - pull_request
+
+permissions: read-all
 
 jobs:
   build:
     strategy:
       fail-fast: false
       matrix:
         os:
-          - macos-latest
           - ubuntu-latest
+          - macos-latest
           - windows-latest
-        ocaml-compiler:
-          - 5.0.x
-          - 4.14.x
-          - 4.08.x
-          - 4.03.x
 
     runs-on: ${{ matrix.os }}
 
     steps:
-      - name: Checkout code
-        uses: actions/checkout@v3
+      - name: Checkout tree
+        uses: actions/checkout@v4
 
-      - name: Use OCaml ${{ matrix.ocaml-compiler }}
-        uses: ocaml/setup-ocaml@v2
+      - name: Set-up OCaml
+        uses: ocaml/setup-ocaml@v3
         with:
-          ocaml-compiler: ${{ matrix.ocaml-compiler }}
+          ocaml-compiler: 5.2
+          ocaml-compiler: 4.14
+          ocaml-compiler: 4.04
 
-      - run: opam install . --deps-only --with-doc --with-test
 
-      - run: opam exec -- dune build @install
+      - run: opam install . --deps-only --with-test
 
-      - run: opam exec -- dune runtest
+      - run: opam exec -- dune build
 
-      - name: Upload the build artifact
-        uses: actions/upload-artifact@v2
-        with:
-          name: ${{ matrix.os }}-${{ matrix.ocaml-version }}-world.exe
-          path: _build/default/world.exe
-
-  lint-doc:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v3
-
-      - name: Use OCaml 4.13.x
-        uses: ocaml/setup-ocaml@v2
-        with:
-          ocaml-compiler: 4.13.x
-          dune-cache: true
-
-      - name: Lint doc
-        uses: ocaml/setup-ocaml/lint-doc@v2
+      - run: opam exec -- dune runtest