Merge pull request #1 from op-rs/emhane/fix-no-std-test-provider

fix(ci): test `maili-provider` with `no_std`

Author: refcell

crates/provider/Cargo.toml

@@ -27,3 +27,7 @@ alloy-rpc-types-engine = { workspace = true, features = ["serde"] }
 
 # misc
 async-trait.workspace = true
+
+[dev-dependencies]
+# `serde` must be explicitly enabled to test with `--no-default-features`
+maili-protocol = { workspace = true, features = ["serde"] }