fix: ci eerror for missing dep

Author: Ebedthan

.github/workflows/ci.yml

@@ -14,6 +14,9 @@ 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:
@@ -53,6 +56,9 @@ jobs:
           toolchain: ${{ matrix.rust }}
           override: true
 
+      - name: Install fontconfig and pkg-config
+        run: sudo apt-get update && sudo apt-get install -y libfontconfig1-dev pkg-config
+
       - name: Run tests
         uses: actions-rs/cargo@v1
         with:
@@ -69,6 +75,9 @@ jobs:
           toolchain: nightly
           override: true
 
+      - name: Install fontconfig and pkg-config
+        run: sudo apt-get update && sudo apt-get install -y libfontconfig1-dev pkg-config
+
       - name: Install cargo-tarpaulin
         uses: actions-rs/install@v0.1
         with: