Remove default-features from nom

Author: alexwennerberg

Cargo.toml

@@ -22,7 +22,7 @@ native-tls = { version = "0.2.2", optional = true }
 regex = "1.0"
 bufstream = "0.1"
 imap-proto = "0.14.0"
-nom = "6.0"
+nom = { version = "6.0", default-features = false }
 base64 = "0.13"
 chrono = { version = "0.4", default-features = false }
 lazy_static = "1.4"