feat!: Update for Tonic v0.12

[cdata]

Hi, I'm considering using this crate, but my project is using Tonic at v0.12, which brings in some other updated dependencies as well. I took a stab at updating this crate to work with the new APIs. I'm opening this PR in case it is a useful basis for your own work to update the dependencies upstream.

[devashishdxt]

Hi @cdata. Thanks for creating this PR. Can you update the crate versions in gzip tests as well and fix clippy errors?

[gRoussac]

This commit seems to address filtoid/tonic-web-wasm-client-example#1 not compiling with 0.5.1 not really sure why though

error was

error[E0277]: the trait bound `Client: Service<request::Request<http_body_util::combinators::box_body::UnsyncBoxBody<prost::bytes::Bytes, Status>>>` is not satisfied
  --> src/lib.rs:22:30
   |
22 |     let mut greeter_client = GreeterServiceClient::new(wasm_client);
   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Service<request::Request<http_body_util::combinators::box_body::UnsyncBoxBody<prost::bytes::Bytes, Status>>>` is not implemented for `Client`, which is required by `Client: GrpcService<http_body_util::combinators::box_body::UnsyncBoxBody<prost::bytes::Bytes, Status>>

[devashishdxt]

Released a new version on crates.io