Update a number of dependencies (#2594)

This commit goes through the dependencies that wasmtime has and updates
versions where possible. This notably brings in a wasmparser/wast update
which has some simd spec changes with new instructions. Otherwise most
of these are just routine updates.

crates/wast/Cargo.toml

@@ -13,7 +13,7 @@ edition = "2018"
 [dependencies]
 anyhow = "1.0.19"
 wasmtime = { path = "../wasmtime", version = "0.22.0", default-features = false }
-wast = "31.0.0"
+wast = "32.0.0"
 
 [badges]
 maintenance = { status = "actively-developed" }