update to v1.4

* Add ability to report file and line number (optional, default=false)

Author: joeybloggs

README.md

@@ -1,6 +1,6 @@
 ## log
 <img align="right" src="https://raw.githubusercontent.com/go-playground/log/master/logo.png">
-![Project status](https://img.shields.io/badge/version-1.3-green.svg)
+![Project status](https://img.shields.io/badge/version-1.4-green.svg)
 [![Build Status](https://semaphoreci.com/api/v1/joeybloggs/log/branches/master/badge.svg)](https://semaphoreci.com/joeybloggs/log)
 [![Coverage Status](https://coveralls.io/repos/github/go-playground/log/badge.svg?branch=master)](https://coveralls.io/github/go-playground/log?branch=master)
 [![Go Report Card](https://goreportcard.com/badge/github.com/go-playground/log)](https://goreportcard.com/report/github.com/go-playground/log)