Fix datatests to be properly working in newer nightly rust

src/script_implementations/wasm/script_resolver.rs

@@ -52,7 +52,7 @@ struct ScriptCapabilitiesKey {
 impl WebAssemblyScriptResolver {
     /// Instantiates a new WebAssemblyScriptResolver.
     pub fn new() -> Box<WebAssemblyScriptResolver> {
-        let compiler = wasmer::LLVM::default();
+        let compiler = wasmer::Cranelift::default();
         let mut features = Features::new();
         features.multi_value = true;
         features.reference_types = true;