Add OCaml starter workflow

ci/ocaml.yml

@@ -0,0 +1,46 @@
+name: OCaml
+
+on:
+  pull_request:
+    - branches: [$default-branch]
+  push:
+    - branches: [$default-branch]
+  schedule:
+    # Prime the caches every Monday
+    - cron: 0 1 * * MON
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - macos-latest
+          - ubuntu-latest
+          - windows-latest
+        ocaml-compiler:
+          - 4.08.x
+          - 4.09.x
+          - 4.10.x
+          - 4.11.x
+          - 4.12.x
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Use OCaml ${{ matrix.ocaml-compiler }}
+        uses: ocaml/setup-ocaml@v2
+        with:
+          ocaml-compiler: ${{ matrix.ocaml-compiler }}
+
+      - name: Install dependencies
+        run: opam install . --deps-only --with-test
+
+      - name: Build
+        run: opam exec -- dune build
+
+      - name: Run tests
+        run: opam exec -- dune runtest

ci/properties/ocaml.properties.json

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+{
+  "name": "OCaml",
+  "description": "Build and test a OCaml project with opam.",
+  "iconName": "ocaml",
+  "categories": ["OCaml"]
+}