Use the new cache plugin

Signed-off-by: Francesco Guardiani <francescoguard@gmail.com>

.github/workflows/rust_tests.yml

@@ -32,21 +32,19 @@ jobs:
       if: matrix.target == 'x86_64-unknown-linux-musl'
 
     # Caching stuff
-    - name: Cache cargo registry
-      uses: actions/cache@v1
+    - uses: actions/cache@v2
       with:
-        path: ~/.cargo/registry
-        key: ${{ runner.os }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}
-    - name: Cache cargo index
-      uses: actions/cache@v1
+        path: |
+          ~/.cargo/bin/
+          ~/.cargo/registry/index/
+          ~/.cargo/registry/cache/
+          ~/.cargo/git/db/
+        key: ${{ runner.os }}-cargo-deps-${{ hashFiles('**/Cargo.lock') }}
+    - uses: actions/cache@v2
       with:
-        path: ~/.cargo/git
-        key: ${{ runner.os }}-cargo-index-${{ hashFiles('**/Cargo.lock') }}
-    - name: Cache cargo build
-      uses: actions/cache@v1
-      with:
-        path: target
-        key: ${{ runner.os }}-cargo-build-target-${{ matrix.toolchain }}-${{ matrix.target }}-${{ hashFiles('**/Cargo.lock') }}
+        path: |
+          target/
+        key: ${{ runner.os }}-cargo-target-${{ matrix.toolchain }}-${{ matrix.target }}-${{ hashFiles('**/Cargo.lock') }}
     - uses: actions-rs/toolchain@v1
       with:
         toolchain: ${{ matrix.toolchain }}