Update Base.props

build/Base.props

@@ -1,7 +1,7 @@
 <Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <VersionPrefix>0.10.10</VersionPrefix>
-    <VersionSuffix>alpha8</VersionSuffix>
+    <VersionSuffix>alpha9</VersionSuffix>
     <Authors>Wiesław Šoltés</Authors>
     <Company>Wiesław Šoltés</Company>
     <Copyright>Copyright © Wiesław Šoltés 2021</Copyright>