chore!: bump MSRV to 1.75

CONTRIBUTING.md

@@ -46,7 +46,7 @@ Every new feature should be covered by functional tests where possible.
 When refactoring, structure your PR to make it easy to review and don't
 hesitate to split it into multiple small, focused PRs.
 
-The Minimum Supported Rust Version is **1.70.0** (enforced by our CI).
+The Minimum Supported Rust Version is **1.75.0** (enforced by our CI).
 
 Commits should cover both the issue fixed and the solution's rationale.
 These [guidelines](https://chris.beams.io/posts/git-commit/) should be kept in mind. Commit messages follow the ["Conventional Commits 1.0.0"](https://www.conventionalcommits.org/en/v1.0.0/) to make commit histories easier to read by humans and automated tools. All commits must be [GPG signed](https://docs.github.com/en/authentication/managing-commit-signature-verification/signing-commits).

Cargo.toml

@@ -4,7 +4,7 @@ version = "0.4.0"
 description = "Experimental but sane electrum client by @evanlinjin."
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.70.0"
+rust-version = "1.75"
 repository = "https://github.com/bitcoindevkit/electrum_streaming_client"
 documentation = "https://docs.rs/electrum_streaming_client"
 readme = "README.md"

src/client.rs

@@ -124,7 +124,7 @@ impl AsyncClient {
                         Some(incoming_res) => {
                             let event_opt = state
                                 .handle_incoming(incoming_res?)
-                                .map_err(|error| std::io::Error::new(std::io::ErrorKind::Other, error))?;
+                                .map_err(std::io::Error::other)?;
                             if let Some(event) = event_opt {
                                 if let Err(_err) = event_tx.unbounded_send(event) {
                                     break;
@@ -325,7 +325,7 @@ impl BlockingClient {
                     .lock()
                     .unwrap()
                     .handle_incoming(incoming_res?)
-                    .map_err(|error| std::io::Error::new(std::io::ErrorKind::Other, error))?;
+                    .map_err(std::io::Error::other)?;
                 if let Some(event) = event_opt {
                     if let Err(_err) = event_tx.send(event) {
                         break;