Use other CI caching approach

.github/workflows/ci.yml

@@ -21,23 +21,12 @@ jobs:
       - uses: actions/checkout@v2
         with:
           submodules: recursive
-      - uses: actions/cache@v1
-        with:
-          path: ~/.cargo/registry
-          key: '${{ runner.os }}-${{ matrix.rust }}-cargo-registry-${{ hashFiles(''**/Cargo.lock'') }}'
-      - uses: actions/cache@v1
-        with:
-          path: ~/.cargo/git
-          key: '${{ runner.os }}-${{ matrix.rust }}-cargo-index-${{ hashFiles(''**/Cargo.lock'') }}'
-      - uses: actions/cache@v1
-        with:
-          path: target
-          key: ${{ runner.os }}-${{ matrix.rust }}-cargo-build-target-${{ hashFiles('**/Cargo.lock') }}
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
           toolchain: ${{ matrix.rust }}
           override: true
+      - uses: Swatinem/rust-cache@v1
       - uses: actions-rs/cargo@v1
         with:
           command: test