Update GitHub Actions workflow

.github/dependabot.yml

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

.github/workflows/master.yml

@@ -1,11 +1,10 @@
-name: Main workflow
+name: Builds, tests & co
 
 on:
-  pull_request:
-  push:
-  schedule:
-    - cron: "0 13 * * 1" # Every Monday at 1PM UTC
-    # https://jasonet.co/posts/scheduled-actions/
+  - push
+  - pull_request
+
+permissions: read-all
 
 jobs:
   build:
@@ -14,24 +13,23 @@ jobs:
       matrix:
         os:
           - ubuntu-latest
-        ocaml-compiler:
-          - 4.13.x
+          - macos-latest
+          - windows-latest
 
     runs-on: ${{ matrix.os }}
 
     steps:
-      - name: Checkout code
-        uses: actions/checkout@v2
+      - 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: 4
 
       # ideally it should be done by `opam install . --deps-only` but right now
       # we have opam 1.x in the repo, and I'm not very optimistic to even try it
-      - run: opam depext conf-dbm -y
-      - run: opam install eliom ocsigen-toolkit cairo2 ocsipersist-dbm calendar syndic -y
+      - run: opam install cairo2 calendar conf-dbm eliom ocsigen-i18n ocsigen-ppx-rpc ocsigen-toolkit ocsipersist-dbm pgocaml_ppx syndic
 
       - name: Compiling simple
         run: opam exec -- make -C simple all

.gitignore

@@ -0,0 +1,6 @@
+_build/
+_client/
+_deps/
+_opam/
+_server/
+.depend