Update to wasmparser 0.9.3.

wasmparser's API is changing in anticipation of streaming decoding, so
it will now hand large data section initializers back in chunks rather
than all at once.

lib/wasm/Cargo.toml

@@ -11,6 +11,6 @@ license = "Apache-2.0"
 name = "cton_wasm"
 
 [dependencies]
-wasmparser = "0.8.2"
+wasmparser = "0.9.3"
 cretonne = { path = "../cretonne" }
 cretonne-frontend = { path = "../frontend" }