Update fuzzers and add building them to CI (#2983)

* update fuzzers for latest changes

* build fuzzers in CI workflow

* move fuzz builds before examples, oops

* use explicit versioning

.github/workflows/rust.yml

@@ -78,6 +78,10 @@ jobs:
           override: true
           profile: minimal
           components: rustfmt, clippy
+      - uses: actions-rs/[email protected]
+        with:
+          crate: cargo-fuzz
+          version: latest
       - uses: Swatinem/rust-cache@v2
         with:
           key: misc
@@ -91,6 +95,8 @@ jobs:
         run: cargo doc -v --document-private-items --all-features
       - name: Build
         run: cargo build --all-targets --quiet --profile ci
+      - name: Build fuzzers
+        run: cargo fuzz build -s none
       - run: cd boa_examples
       - name: Build examples
         run: cargo build --quiet --profile ci