.github: Update CI

Author: simnalamburt

.github/workflows/ci.yml

@@ -7,7 +7,11 @@ jobs:
         os: [ubuntu-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy, rustfmt
+      - uses: Swatinem/rust-cache@v2
       - run: cargo build
       - run: cargo test
       - run: cargo clippy --no-deps -- -D warnings