Chore: 3.1.0

# [3.1.0](v3.0.2...v3.1.0) (2022-04-11)

## Update
* Migrated to .NET6.0 (coscine/issues#1910)
* Migrated to .NET6.0 (coscine/issues#1910)

src/Metadata/Metadata.csproj

@@ -5,7 +5,7 @@
 		<AssemblyName>Coscine.Api.Metadata</AssemblyName>
 		<GenerateDocumentationFile>true</GenerateDocumentationFile>
 		<TargetFramework>net6.0</TargetFramework>
-		<Version>3.0.2</Version>
+		<Version>3.1.0</Version>
 	</PropertyGroup>
 	<PropertyGroup>
 		<Authors>RWTH Aachen University</Authors>