wasm-mutate fuzz targets (#3836)

* fuzzing: Add a custom mutator based on `wasm-mutate`

* fuzz: Add a version of the `compile` fuzz target that uses `wasm-mutate`

* Update `wasmparser` dependencies

crates/fuzzing/src/lib.rs

@@ -2,8 +2,10 @@
 
 #![deny(missing_docs)]
 
+pub use wasm_mutate;
 pub use wasm_smith;
 pub mod generators;
+pub mod mutators;
 pub mod oracles;
 
 /// One time start up initialization for fuzzing: