Bump rustler from 0.31.0 to 0.33.0 in /native/wasmex

Bumps [rustler](https://github.com/rusterlium/rustler) from 0.31.0 to 0.33.0.
- [Release notes](https://github.com/rusterlium/rustler/releases)
- [Changelog](https://github.com/rusterlium/rustler/blob/master/CHANGELOG.md)
- [Commits](rusterlium/rustler@rustler-0.31.0...rustler-0.33.0)

---
updated-dependencies:
- dependency-name: rustler
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

native/wasmex/Cargo.lock

@@ -15,7 +15,7 @@ path = "src/lib.rs"
 crate-type = ["dylib"]
 
 [dependencies]
-rustler = { version = "0.31", default-features = false, features = [
+rustler = { version = "0.33", default-features = false, features = [
     "derive",
     "nif_version_2_15",
 ] }