Bump tokio-streams minimum version to 0.1.1

The `Stream` wrappers that are used were added in 0.1.1:
https://github.com/tokio-rs/tokio/blob/master/tokio-stream/CHANGELOG.md#011-january-4-2021

Author: MidasLamb

opentelemetry-sdk/Cargo.toml

@@ -28,7 +28,7 @@ serde_json = { version = "1", optional = true }
 thiserror = "1"
 url = { version = "2.2", optional = true }
 tokio = { version = "1.0", default-features = false, features = ["rt", "time"], optional = true }
-tokio-stream = { version = "0.1", optional = true }
+tokio-stream = { version = "0.1.1", optional = true }
 http = { version = "0.2", optional = true }
 
 [package.metadata.docs.rs]