wasmtime-execute is now wasmtime-jit. Move `JITCode` and the TargetIsa into a new `Compiler` type. `InstancePlus` is no more, with trampoline functionality now handled by `Compiler`.
This is the wasmtime-wast crate, which contains an implementation of WebAssembly's
"wast" test scripting language, which is used in the
WebAssembly spec testsuite, using wasmtime for execution.