FIX: Don't tell docs.rs to build all features as sync and async features cannot be combined.

Author: ximon18

Cargo.toml

@@ -13,7 +13,6 @@ readme = "README.md"
 build = "build.rs"
 
 [package.metadata.docs.rs]
-all-features = true
 rustdoc-args = ["--cfg", "docsrs"]
 
 [dependencies]