Use a crates.io-based version of Wasmtime (#517)

Author: alexcrichton

Cargo.lock

@@ -71,6 +71,6 @@ go = ['dep:wit-bindgen-gen-guest-go']
 
 [dev-dependencies]
 heck = { workspace = true }
-wasmtime = { git = 'https://github.com/bytecodealliance/wasmtime', features = ['component-model'], branch = 'release-6.0.0' }
+wasmtime = { version = "6", features = ['component-model'] }
 test-artifacts = { path = 'crates/test-rust-wasm/artifacts' }
 wit-parser = { workspace = true }