chore(ci): use smarter dependencies cache

.github/workflows/rust.yml

@@ -22,19 +22,13 @@ jobs:
           - nightly
     steps:
     - uses: actions/checkout@v2
-    - name: Cache dependencies
-      uses: actions/cache@v2
-      with:
-        path: |
-          ~/.cargo
-          ./Cargo.lock
-          ./target
-        key: ${{ matrix.os }}-${{ matrix.rust }}-${{ hashFiles('Cargo.toml') }}
     - uses: actions-rs/toolchain@v1
       with:
         profile: minimal
         toolchain: ${{ matrix.rust }}
         override: true
+    - name: Cache dependencies
+      uses: Swatinem/rust-cache@v1.3.0
     - name: Run cargo check
       uses: actions-rs/cargo@v1
       with:
@@ -51,20 +45,14 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - uses: actions/checkout@v2
-      - name: Cache dependencies
-        uses: actions/cache@v2
-        with:
-          path: |
-            ~/.cargo
-            ./Cargo.lock
-            ./target
-          key: ${{ matrix.os }}-${{ matrix.rust}}-${{ hashFiles('Cargo.toml') }}
       - uses: actions-rs/toolchain@v1
         with:
           profile: minimal
           toolchain: nightly
           override: true
           components: rustfmt
+      - name: Cache dependencies
+        uses: Swatinem/rust-cache@v1.3.0
       - name: Run cargo fmt
         # Since we never ran the `build.rs` script in the benchmark directory we are missing one auto-generated import file.
         # Since we want to trigger (and fail) this action as fast as possible, instead of building the benchmark crate