ci: fix rust 1.22 build

Signed-off-by: Antoine Poinsot <[email protected]>

Author: darosior

.github/workflows/rust.yml

@@ -58,15 +58,17 @@ jobs:
           - 1.22.0
           - beta
           - stable
-    steps:      
-      - name: Checkout Crate 
+    steps:
+      - name: Checkout Crate
         uses: actions/checkout@v2
       - name: Checkout Toolchain
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
           toolchain: ${{ matrix.rust }}
           override: true
+      - name: Pin cc if rust 1.22
+        if: matrix.rust == '1.22.0'
+        run: cargo generate-lockfile --verbose && cargo update -p cc --precise "1.0.41" --verbose
       - name: Running cargo
         run: ./contrib/test.sh
-