Allow colored crate version 3

Author: tottoto

Cargo.toml

@@ -20,7 +20,7 @@ appveyor = { repository = "lipanski/mockito", branch = "master", service = "gith
 [dependencies]
 assert-json-diff = "2.0"
 bytes = "1"
-colored = { version = "2.0", optional = true }
+colored = { version = ">=2.0, <=3", optional = true }
 futures-util = { version = "0.3", default-features = false }
 http = "1"
 http-body = "1"