function withDelay( err ) {
			if ( err ) {
				return console.log( err );
			}
			console.log( 'Waiting '+waitTime+'ms before moving to next package...' );
			setTimeout( invokeCallback, waitTime );
		}
Invokes callback for once pushing package contents to remote GitHub repository after a specified delay.

@private
@param {(Error|null)} err - error object or `null`
@returns {void}