aws-config (0.56) depends on tokio+mio - breaks on WASM

[simbleau]

mio is not wasm-compatible, which is a dep of tokio.

In the latest version of aws-config (0.56) I believe there was a change, specifically around tls, which started to bring this in.

Here's whats in my toml:

aws-config = { version = "0.56", default-features = false, features = [
  "rustls",
] }

Here's my cargo tree:

├── aws-config v0.56.0
│   ├── aws-credential-types v0.56.0
│   │   ├── aws-smithy-async v0.56.0
│   │   │   ├── futures-util v0.3.28 (*)
│   │   │   ├── pin-project-lite v0.2.12
│   │   │   ├── tokio v1.31.0
│   │   │   │   ├── bytes v1.4.0 (*)
│   │   │   │   ├── libc v0.2.147
│   │   │   │   ├── mio v0.8.8
│   │   │   │   │   └── libc v0.2.147
│   │   │   │   ├── num_cpus v1.16.0
│   │   │   │   │   └── libc v0.2.147

If you try to run a wasm-pack test you'll get this exact heap of errors:
seanmonstar/reqwest#1300

[simbleau]

I opened this issue in aws-sdk-rust instead.