Bump version to 3.3.1

Author: mattjohnsonpint

src/TimeZoneNames/TimeZoneNames.csproj

@@ -10,7 +10,7 @@
     <PackageLicenseUrl>https://raw.githubusercontent.com/mj1856/TimeZoneNames/master/LICENSE</PackageLicenseUrl>
     <IncludeSource>True</IncludeSource>
     <IncludeSymbols>True</IncludeSymbols>
-    <Version>3.3.0</Version>
+    <Version>3.3.1</Version>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)' == 'Release'">