Disable nom default features

Author: djc

imap-proto/Cargo.toml

@@ -16,7 +16,7 @@ azure-devops = { project = "dochtman/Projects", pipeline = "tokio-imap", build =
 maintenance = { status = "passively-maintained" }
 
 [dependencies]
-nom = "5"
+nom = { version = "5", default-features = false, features = ["std"] }
 
 [dev-dependencies]
 assert_matches = "1.3"