Update metadata for release

CHANGELOG.md

@@ -3,7 +3,7 @@
 This file lists the main changes with each version of the Fyne toolkit.
 More detailed release notes can be found on the [releases page](https://github.com/fyne-io/fyne/releases). 
 
-## 1.2.4 - Ongoing
+## 1.2.4 - 13 April 2020
 
 ### Added
 

README.md

@@ -1,6 +1,6 @@
 <p align="center">
   <a href="https://pkg.go.dev/fyne.io/fyne?tab=doc" title="Go API Reference" rel="nofollow"><img src="https://img.shields.io/badge/go-documentation-blue.svg?style=flat" alt="Go API Reference"></a>
-  <a href="https://github.com/fyne-io/fyne/releases/tag/v1.2.3" title="1.2.3 Release" rel="nofollow"><img src="https://img.shields.io/badge/version-1.2.3-blue.svg?style=flat" alt="1.2.3 release"></a>
+  <a href="https://github.com/fyne-io/fyne/releases/tag/v1.2.4" title="1.2.4 Release" rel="nofollow"><img src="https://img.shields.io/badge/version-1.2.4-blue.svg?style=flat" alt="1.2.4 release"></a>
   <a href='http://gophers.slack.com/messages/fyne'><img src='https://img.shields.io/badge/join-us%20on%20slack-gray.svg?longCache=true&logo=slack&colorB=blue' alt='Join us on Slack' /></a>
   <br />
   <a href="https://goreportcard.com/report/fyne.io/fyne"><img src="https://goreportcard.com/badge/fyne.io/fyne" alt="Code Status" /></a>
@@ -17,8 +17,9 @@ single codebase.
 
 Version 1.2 is the current release which added support for iOS and Android devices
 as well as providing much simpler ways to write custom widgets.
-We are now working towards 1.3 which will add data binding and some more advanced
-widgets such as tables and lists.
+We are now working towards [1.3](https://github.com/fyne-io/fyne/milestone/7)
+which will add data file dialogs, notifications and many new widgets to create more
+complete applications.
 
 # Prerequisites