change dev version number to 1.5-x (#5856)

Author: Aaronontheweb

RELEASE_NOTES.md

@@ -1,3 +1,6 @@
+#### 1.5.0-beta1 April 20 2022 ####
+**Placeholder for first beta release of Akka.NET v1.5**
+
 #### 1.4.37 April 14 2022 ####
 Akka.NET v1.4.37 is a minor release that contains some minor bug fixes.
 

src/common.props

@@ -2,7 +2,7 @@
   <PropertyGroup>
     <Copyright>Copyright © 2013-2021 Akka.NET Team</Copyright>
     <Authors>Akka.NET Team</Authors>
-    <VersionPrefix>1.4.34</VersionPrefix>
+    <VersionPrefix>1.5.0</VersionPrefix>
     <PackageIcon>akkalogo.png</PackageIcon>
     <PackageProjectUrl>https://github.com/akkadotnet/akka.net</PackageProjectUrl>
     <PackageLicenseUrl>https://github.com/akkadotnet/akka.net/blob/master/LICENSE</PackageLicenseUrl>
@@ -34,7 +34,7 @@
     <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
   </PropertyGroup>
   <PropertyGroup>
-    <PackageReleaseNotes>Placeholder for nightlies**</PackageReleaseNotes>
+    <PackageReleaseNotes>Placeholder for first beta release of Akka.NET v1.5**</PackageReleaseNotes>
   </PropertyGroup>
   <!-- SourceLink support for all Akka.NET projects -->
   <ItemGroup>