Hide compression behind "compress" feature

Author: link2xt

src/client.rs

@@ -19,10 +19,12 @@ use super::authenticator::Authenticator;
 use super::error::{Error, ParseError, Result, ValidateError};
 use super::parse::*;
 use super::types::*;
-use crate::deflate::DeflateStream;
 use crate::extensions::{self, quota::parse_get_quota};
 use crate::imap_stream::ImapStream;
 
+#[cfg(feature = "compress")]
+use crate::deflate::DeflateStream;
+
 macro_rules! quote {
     ($x:expr) => {
         format!("\"{}\"", $x.replace(r"\", r"\\").replace("\"", "\\\""))
@@ -1326,6 +1328,7 @@ impl<T: Read + Write + Unpin + fmt::Debug + Send> Session<T> {
     }
 
     /// Runs `COMPRESS DEFLATE` command.
+    #[cfg(feature = "compress")]
     pub async fn compress<F, S>(self, f: F) -> Result<Session<S>>
     where
         S: Read + Write + Unpin + fmt::Debug,