witx: Update wast dependency (#433)

Author: olivierlemasle

tools/witx/Cargo.toml

@@ -17,7 +17,7 @@ crate-type=["rlib"]
 anyhow = "1"
 log = "0.4"
 thiserror = "1.0"
-wast = { version = "33.0.0", default-features = false }
+wast = { version = "35.0.2", default-features = false }
 
 [dev-dependencies]
 rayon = "1.0"