fontconfig dep

Author: mx4

.github/workflows/ci.yml

@@ -21,6 +21,8 @@ jobs:
       uses: dtolnay/rust-toolchain@master
       with:
         toolchain: stable
+    - name: install dependencies
+      run: sudo apt-get install -y libfontconfig1-dev
     - name: build
       run: cargo build --verbose