refactor: switch to caslex (#32)

* refactor: switch to caslex

Author: mkbeh

.github/workflows/ci.yml

@@ -13,12 +13,17 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout repository
-        uses: actions/checkout@v2
-
-      - name: Lint
-        run: |
-          cargo clippy -- -D warnings
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@nightly
+        with:
+          components: clippy, rustfmt
+      - uses: Swatinem/rust-cache@v2
+        with:
+          save-if: ${{ github.ref == 'refs/heads/main' }}
+      - name: Check
+        run: cargo clippy --workspace --all-targets --all-features -- -D warnings
+      - name: rustfmt
+        run: cargo +nightly fmt --all --check
 
   build:
     needs: [ "lint" ]