Bump version to 0.3.0

Author: JannikLassahn

src/GraphQL.Upload.AspNetCore/GraphQL.Upload.AspNetCore.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>netstandard2.0</TargetFramework>
-    <Version>0.2.1</Version>
+    <Version>0.3.0</Version>
     <Authors>Jannik Lassahn</Authors>
     <Company />
     <RepositoryUrl>https://github.com/JannikLassahn/graphql-dotnet-upload</RepositoryUrl>