Add caching to CI workflow

.github/workflows/ci.yml

@@ -19,6 +19,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
+      - uses: Swatinem/rust-cache@v2.7.3
       - name: Run benchmarks
         run: cargo bench --all
 
@@ -28,6 +29,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
+      - uses: Swatinem/rust-cache@v2.7.3
       - name: Build (release)
         run: cargo build --all --release
 
@@ -37,6 +39,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
+      - uses: Swatinem/rust-cache@v2.7.3
       - name: Run Rustfmt
         run: cargo fmt --all -- --check
 
@@ -46,6 +49,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
+      - uses: Swatinem/rust-cache@v2.7.3
       - name: Run Clippy
         run: cargo clippy --all
 
@@ -55,5 +59,6 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
+      - uses: Swatinem/rust-cache@v2.7.3
       - name: Run tests
         run: cargo test --all