update github workflow

.github/workflows/ci.yml

@@ -17,6 +17,9 @@ jobs:
           toolchain: nightly
           override: true
 
+      - name: Install fonttools
+        run: sudo apt-get install -y fonttools
+
       - name: Run cargo check
         uses: actions-rs/cargo@v1
         with:
@@ -36,6 +39,9 @@ jobs:
           toolchain: nightly
           override: true
 
+      - name: Install fonttools
+        run: sudo apt-get install -y fonttools
+
       - name: Install cargo-all-features
         uses: actions-rs/install@v0.1
         with: