Upgrade to Akka.NET v1.5.22

Need this for #285

Author: Aaronontheweb

src/Directory.Build.props

@@ -12,7 +12,7 @@
     <LangVersion>10</LangVersion>
   </PropertyGroup>
   <PropertyGroup>
-    <AkkaVersion>1.5.14</AkkaVersion>
+    <AkkaVersion>1.5.22</AkkaVersion>
     <AkkaHostingVersion>1.5.13</AkkaHostingVersion>
     <NetCoreTestVersion>netcoreapp3.1</NetCoreTestVersion>
     <NetFrameworkTestVersion>net471</NetFrameworkTestVersion>
@@ -30,4 +30,4 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.SourceLink.GitHub" PrivateAssets="All" />
   </ItemGroup>
-</Project>
+</Project>