chore: add rust-cache to workflows

.github/workflows/ci.yml

@@ -29,14 +29,16 @@ jobs:
  - self-hosted
  runs-on: ${{ matrix.os }}
  steps:
- - uses: actions/checkout@v2
+ - uses: actions/checkout@v4
 
  - uses: actions-rs/toolchain@v1
  with:
  profile: minimal
  toolchain: ${{ matrix.rust }}
  override: true
 
+ - uses: Swatinem/rust-cache@v2
+
  - run: cargo build --all
 
  - run: cargo build --all --release
@@ -51,19 +53,21 @@ jobs:
  - self-hosted
  runs-on: ${{ matrix.os }}
  steps:
- - uses: actions/checkout@v2
+ - uses: actions/checkout@v4
 
  - uses: actions-rs/toolchain@v1
  with:
  toolchain: stable
 
+ - uses: Swatinem/rust-cache@v2
+
  - run: cargo test
 
  linting:
  name: Linting
  runs-on: ubuntu-latest
  steps:
- - uses: actions/checkout@v2
+ - uses: actions/checkout@v4
  with:
  submodules: true
 
@@ -72,13 +76,15 @@ jobs:
  toolchain: stable
  components: clippy
 
+ - uses: Swatinem/rust-cache@v2
+
  - run: cargo clippy --all-targets
 
  formatting:
  name: Formatting
  runs-on: ubuntu-latest
  steps:
- - uses: actions/checkout@v2
+ - uses: actions/checkout@v4
  with:
  submodules: true
 
@@ -87,4 +93,6 @@ jobs:
  toolchain: stable
  components: rustfmt
 
+ - uses: Swatinem/rust-cache@v2
+
  - run: cargo fmt -- --check