Update GitHub Actions workflow

Signed-off-by: Sora Morimoto <[email protected]>

Author: smorimoto

.github/workflows/workflow.yml

@@ -1,24 +1,26 @@
-name: Main workflow
+name: Builds, tests & co
 
 on:
-  pull_request:
   push:
+  pull_request:
   schedule:
     # Prime the caches every Monday
     - cron: 0 1 * * MON
 
+permissions: read-all
+
 jobs:
   build:
     strategy:
       fail-fast: false
       matrix:
         os:
-          - macos-latest
           - ubuntu-latest
+          - macos-latest
           - windows-latest
         ocaml-compiler:
-          - "4.14"
-          - "5.2"
+          - 5
+          - 4
         include:
           - os: ubuntu-latest
             ocaml-compiler: "4.08"
@@ -40,10 +42,42 @@ jobs:
         uses: ocaml/setup-ocaml@v3
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}
-          opam-pin: false
 
       - run: opam install . --deps-only
 
       - run: opam exec -- bash ./configure
 
       - run: opam exec -- make all
+
+  lint-doc:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout tree
+        uses: actions/checkout@v4
+      - name: Set-up OCaml
+        uses: ocaml/setup-ocaml@v3
+        with:
+          ocaml-compiler: 5
+      - uses: ocaml/setup-ocaml/lint-doc@v3
+
+  lint-fmt:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout tree
+        uses: actions/checkout@v4
+      - name: Set-up OCaml
+        uses: ocaml/setup-ocaml@v3
+        with:
+          ocaml-compiler: 5
+      - uses: ocaml/setup-ocaml/lint-fmt@v3
+
+  lint-opam:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout tree
+        uses: actions/checkout@v4
+      - name: Set-up OCaml
+        uses: ocaml/setup-ocaml@v3
+        with:
+          ocaml-compiler: 5
+      - uses: ocaml/setup-ocaml/lint-opam@v3