Increment version to 5.1.3 (used for pre-release builds from ci)

Author: bkoelman

Diff for: Directory.Build.props

@@ -4,7 +4,7 @@
     <AspNetVersion>6.0.*</AspNetVersion>
     <JsonApiDotNetCoreVersion>5.1.2</JsonApiDotNetCoreVersion>
     <MongoDBDriverVersion>2.15.0</MongoDBDriverVersion>
-    <JsonApiDotNetCoreMongoDbVersionPrefix>5.1.2</JsonApiDotNetCoreMongoDbVersionPrefix>
+    <JsonApiDotNetCoreMongoDbVersionPrefix>5.1.3</JsonApiDotNetCoreMongoDbVersionPrefix>
     <CodeAnalysisRuleSet>$(MSBuildThisFileDirectory)CodingGuidelines.ruleset</CodeAnalysisRuleSet>
     <WarningLevel>9999</WarningLevel>
     <Nullable>enable</Nullable>