Update ocaml/setup-ocaml to v3

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: weekly

.github/workflows/deploy-doc.yml

@@ -1,22 +1,54 @@
-name: Deploy odoc
+name: Deploy odoc to GitHub Pages
 
 on:
   push:
     branches:
       - master
 
+permissions: read-all
+
+concurrency:
+  group: deploy-odoc
+  cancel-in-progress: true
+
 jobs:
-  deploy-doc:
+  deploy-odoc:
+    name: Deploy odoc to GitHub Pages
+
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    permissions:
+      contents: read
+      id-token: write
+      pages: write
+
     runs-on: ubuntu-latest
+
     steps:
-      - name: Checkout code
-        uses: actions/checkout@v3
+      - name: Checkout tree
+        uses: actions/checkout@v4
 
-      - name: Use OCaml 4.13.x
+      - name: Set-up OCaml
         uses: ocaml/setup-ocaml@v2
         with:
-          ocaml-compiler: 4.13.x
-          dune-cache: true
+          ocaml-compiler: "4.14"
+
+      - name: Install dependencies
+        run: opam install . --deps-only --with-doc
+
+      - name: Build documentation
+        run: opam exec -- dune build @doc
+
+      - name: Set-up Pages
+        uses: actions/configure-pages@v5
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: _build/default/_doc/_html
 
       - name: Deploy odoc to GitHub Pages
-        uses: ocaml/setup-ocaml/deploy-doc@v2
+        id: deployment
+        uses: actions/deploy-pages@v4

.github/workflows/workflow.yml

@@ -17,23 +17,17 @@ jobs:
           - windows-latest
         ocaml-compiler:
           # Decision on version matrix informed by https://discuss.ocaml.org/t/which-ocaml-compiler-versions-should-we-run-against-in-ci/7933/2
-          - 4.13.x
-          - 4.14.x
-        include:
-          - ocaml-compiler: 5.0.x
-            os:
-              - ubuntu-latest
-          - ocaml-compiler: 5.0.x
-            os:
-              - macos-latest
+          - "4.13"
+          - "4.14"
+          - "5.2"
 
     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 ${{ matrix.ocaml-compiler }}
+        uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
 
@@ -49,44 +43,38 @@ jobs:
   lint-doc:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout code
-        uses: actions/checkout@v3
+      - name: Checkout tree
+        uses: actions/checkout@v4
 
-      - name: Use OCaml 4.14.x
-        uses: ocaml/setup-ocaml@v2
+      - name: Set-up OCaml
+        uses: ocaml/setup-ocaml@v3
         with:
-          ocaml-compiler: 4.14.x
-          dune-cache: true
+          ocaml-compiler: "4.14"
 
-      - name: Lint doc
-        uses: ocaml/setup-ocaml/lint-doc@v2
+      - uses: ocaml/setup-ocaml/lint-doc@v3
 
   lint-fmt:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout code
-        uses: actions/checkout@v3
+      - name: Checkout tree
+        uses: actions/checkout@v4
 
-      - name: Use OCaml 4.14.x
-        uses: ocaml/setup-ocaml@v2
+      - name: Set-up OCaml
+        uses: ocaml/setup-ocaml@v3
         with:
-          ocaml-compiler: 4.14.x
-          dune-cache: true
+          ocaml-compiler: "4.14"
 
-      - name: Lint fmt
-        uses: ocaml/setup-ocaml/lint-fmt@v2
+      - uses: ocaml/setup-ocaml/lint-fmt@v3
 
   lint-opam:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout code
-        uses: actions/checkout@v3
+      - name: Checkout tree
+        uses: actions/checkout@v4
 
-      - name: Use OCaml 4.14.x
-        uses: ocaml/setup-ocaml@v2
+      - name: Set-up OCaml
+        uses: ocaml/setup-ocaml@v3
         with:
-          ocaml-compiler: 4.14.x
-          dune-cache: true
+          ocaml-compiler: "4.14"
 
-      - name: Lint opam
-        uses: ocaml/setup-ocaml/lint-opam@v2
+      - uses: ocaml/setup-ocaml/lint-opam@v3