add cargo-fuzz

.github/workflows/fuzz.yml

@@ -0,0 +1,22 @@
+name: Cargo Fuzz
+
+on:
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}
+  cancel-in-progress: true
+
+jobs:
+  fuzz:
+    name: Cargo Fuzz
+    runs-on: ubuntu-latest
+    steps:
+      - uses: taiki-e/checkout-action@v1
+
+      - uses: Boshen/setup-rust@main
+
+      - run: cargo install cargo-fuzz
+
+      - name: Run Fuzzer
+        run: cargo +nightly fuzz run --sanitizer none --release parser -- -only_ascii=1 -detect_leaks=0 -max_total_time=900

.gitignore

@@ -3,3 +3,6 @@ target
 
 __tmp.js
 _minimizer-best.json
+
+fuzz/artifacts
+fuzz/corpus