add caching

Author: Roguelazer

.github/workflows/ci.yml

@@ -18,6 +18,7 @@ jobs:
       with:
         components: rustfmt,clippy
         toolchain: 1.91.1
+    - uses: Swatinem/rust-cache@v2
     - name: cargo fmt
       run: cargo fmt --all -- --check
     - name: cargo clippy
@@ -32,6 +33,7 @@ jobs:
     - uses: dtolnay/rust-toolchain@stable
       with:
         toolchain: ${{ matrix.rust }}
+    - uses: Swatinem/rust-cache@v2
     - name: Test
       uses: actions-rs/cargo@v1
       with:
@@ -43,6 +45,7 @@ jobs:
     - uses: dtolnay/rust-toolchain@stable
       with:
         toolchain: stable
+    - uses: Swatinem/rust-cache@v2
     - name: cargo audit
       uses: actions-rs/[email protected]
       with: