fuzzing: Enable NaN canonicalization (#1334)

* Method to enable NaN canonicalization in Config

* Use fuzz_default_config in DifferentialConfig

* Enable NaN canonicalization for fuzzing

crates/fuzzing/src/lib.rs

@@ -30,3 +30,18 @@ pub(crate) fn init_fuzzing() {
             .expect("should only initialize the rayon thread pool once!");
     })
 }
+
+/// Create default fuzzing config with given strategy
+pub(crate) fn fuzz_default_config(
+    strategy: wasmtime::Strategy,
+) -> anyhow::Result<wasmtime::Config> {
+    init_fuzzing();
+    let mut config = wasmtime::Config::new();
+    config
+        .cranelift_debug_verifier(true)
+        .cranelift_nan_canonicalization(true)
+        .wasm_multi_value(true)
+        .wasm_bulk_memory(true)
+        .strategy(strategy)?;
+    Ok(config)
+}