Merge pull request #113 from 1u0n/cleanup-listeners

avoid too many event listeners

index.js

@@ -302,12 +302,16 @@ class Rs extends Transform {
 			return Promise.resolve();
 		} else {
 			return new Promise((resolve, reject) => {
-				this.ws.once('error', err => reject(err));
+				const fn = err => reject(err);
+				this.ws.once('error', fn);
 				this.ws.once('drain', err => {
-					if (err) return reject(err);
-					
-					resolve();
-				})
+					this.ws.removeListener('error', fn);
+					if (err) {
+						reject(err);
+					} else {
+						resolve();
+					}
+				});
 			});
 		}
 	}