Update winston to 3.x to get rid of the circular dependency warning

This warning came from winston 0.8.x:

    Warning: Accessing non-existent property 'padLevels' of module
    exports inside circular dependency

See foreversd/forever#1077

lib/cliff.js

@@ -19,20 +19,15 @@ cliff.__defineGetter__('logger', function () {
 
 cliff.__defineSetter__('logger', function (val) {
   logger = val;
-
-  //
-  // Setup winston to use the `cli` formats
-  //
-  if (logger.cli) {
-    logger.cli();
-  }
 });
 
 //
 // Set the default logger for cliff.
 //
-cliff.logger = new winston.Logger({
-  transports: [new winston.transports.Console()]
+cliff.logger = winston.createLogger({
+  transports: [new winston.transports.Console({
+    format: winston.format.cli(),
+  })]
 });
 
 //