Set v0.3.0 release date. Remove beta tag

Author: devblackops

CHANGELOG.md

@@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
-## [0.3.0] - Unreleased
+## [0.3.0] - 2019-04-23
 
 ### Fixed
 

PowerShellBuild/PowerShellBuild.psd1

@@ -24,7 +24,6 @@
     AliasesToExport   = @('*tasks')
     PrivateData       = @{
         PSData = @{
-            PreRelease   = 'beta2'
             Tags         = @('psake', 'build', 'InvokeBuild')
             LicenseUri   = 'https://raw.githubusercontent.com/psake/PowerShellBuild/master/LICENSE'
             ProjectUri   = 'https://github.com/psake/PowerShellBuild'