poke CI (#157)

* poke CI

* setup ocaml v3

* add 5.1 / 5.2

.github/workflows/build.yml

@@ -20,10 +20,11 @@ jobs:
           - {ocaml-version: '4.05', runtest: false}
           - {ocaml-version: '4.09', runtest: true}
           - {ocaml-version: '4.14', runtest: true}
-          - {ocaml-version: '5.0', runtest: true}
+          - {ocaml-version: '5.1', runtest: true}
+          - {ocaml-version: '5.2', runtest: true}
     steps:
-    - uses: actions/checkout@v2
-    - uses: ocaml/setup-ocaml@v2
+    - uses: actions/checkout@v4
+    - uses: ocaml/setup-ocaml@v3
       with:
         ocaml-compiler:  ${{ matrix.setup.ocaml-version }}
     - name: Setup opam
@@ -48,11 +49,12 @@ jobs:
           - {ocamlVersion: 4_12, os: ubuntu-latest}
           - {ocamlVersion: 4_13, os: ubuntu-latest}
           - {ocamlVersion: 4_14, os: ubuntu-latest}
-          - {ocamlVersion: 5_0, os: ubuntu-latest}
-          - {ocamlVersion: 5_0, os: macos-latest}
+          - {ocamlVersion: 5_1, os: ubuntu-latest}
+          - {ocamlVersion: 5_2, os: ubuntu-latest}
+          - {ocamlVersion: 5_2, os: macos-latest}
     steps:
-    - uses: actions/checkout@v3
-    - uses: cachix/install-nix-action@v22
+    - uses: actions/checkout@v4
+    - uses: cachix/install-nix-action@v27
       with:
         extra_nix_config: |
           extra-substituters = https://anmonteiro.nix-cache.workers.dev