fix msrv (#1877)

Author: lalitb

Cargo.toml

@@ -45,4 +45,4 @@ tokio-stream = "0.1.1"
 tracing = { version = "0.1", default-features = false }
 tracing-core = { version = "0.1", default-features = false }
 tracing-subscriber = { version = "0.3", default-features = false }
-url = { version = "2.2", default-features = false }
+url = { version = "=2.5.0", default-features = false } #pinning the version supporting rustc 1.65