Update test suite to run on macOS and Windows

.github/workflows/CI.yml

@@ -16,19 +16,33 @@ jobs:
         shell: bash
     strategy:
       matrix:
-        os: [ubuntu-latest]
-
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+        vim:
+          - '9.0.2190'
+          - '8.2.5172'
+
     steps:
-      - uses: actions/checkout@v1.0.0
-      - name: Install dependencies
+      - uses: actions/checkout@v4
+      - name: Install coverage dependencies
+        if: ${{ matrix.os == 'ubuntu-latest' }}
         run: |
           sudo apt-get update
-          sudo apt-get install -y libcurl4-openssl-dev libelf-dev libdw-dev cmake vim kcov
-      - name: Run tests
+          sudo apt-get install -y libcurl4-openssl-dev libelf-dev libdw-dev cmake kcov
+      - uses: rhysd/action-setup-vim@v1
+        with:
+          version: ${{ matrix.vim }}
+      - name: Run tests without coverage
+        if: ${{ matrix.os != 'ubuntu-latest' }}
+        run: |
+          TEST_DIR=$(pwd)/test VIMS=./vims ./test/test.sh
+      - name: Run tests with coverage
+        if: ${{ matrix.os == 'ubuntu-latest' }}
         run: |
           mkdir -p coverage
           TEST_DIR=$(pwd)/test VIMS=./vims kcov coverage ./test/test.sh
       - name: Upload coverage
+        if: ${{ matrix.os == 'ubuntu-latest' }}
         run: bash <(curl -s https://codecov.io/bash) -s coverage
-
-