Is your feature request related to a problem? Please describe.

The Rust reqwest library currently generates as ~0.9 when using sync, while it generates as 0.11 when using async.
This can cause type-matching problems with libraries generated with openapi-generator and packages/crates using them, it also lacks improvements such as cookie stores.

Describe the solution you'd like

Updating the library version, enabling the blocking feature flag when using sync, swapping the types from the old reqwest::Client (0.9-sync) to the new reqwest::blocking::Client (0.11-sync), and enabling some feature flags such as json, multipart, cookies, etc.