fix: conditionnal installation of deps in ci

Author: Ebedthan

.github/workflows/ci.yml

@@ -56,9 +56,14 @@ jobs:
           toolchain: ${{ matrix.rust }}
           override: true
 
-      - name: Install fontconfig and pkg-config
+      - name: Install fontconfig on Ubuntu
+        if: matrix.os == 'ubuntu-latest'
         run: sudo apt-get update && sudo apt-get install -y libfontconfig1-dev pkg-config
 
+      - name: Install fontconfig on macOS
+        if: matrix.os == 'macos-latest'
+        run: brew install fontconfig pkg-config
+
       - name: Run tests
         uses: actions-rs/cargo@v1
         with:
@@ -103,6 +108,9 @@ jobs:
       - name: Checkout sources
         uses: actions/checkout@v2
 
+      - name: Install fontconfig and pkg-config
+        run: sudo apt-get update && sudo apt-get install -y libfontconfig1-dev pkg-config
+
       - name: Install stable toolchain
         uses: actions-rs/toolchain@v1
         with:
@@ -128,6 +136,9 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
+      - name: Install fontconfig and pkg-config
+        run: sudo apt-get update && sudo apt-get install -y libfontconfig1-dev pkg-config
+
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: 1.82.0