chore(csproj): bump version

Author: jfhs

README.md

@@ -46,14 +46,14 @@ Install-Package JsonApiDotnetCore
 
 - project.json
 ```json
-"JsonApiDotNetCore": "1.2.0"
+"JsonApiDotNetCore": "1.2.1"
 ```
 
 - *.csproj
 ```xml
 <ItemGroup>
     <!-- ... -->
-    <PackageReference Include="JsonApiDotNetCore" Version="1.2.0" />
+    <PackageReference Include="JsonApiDotNetCore" Version="1.2.1" />
 </ItemGroup>
 ```
 

src/JsonApiDotNetCore/JsonApiDotNetCore.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <VersionPrefix>1.2.0</VersionPrefix>
+    <VersionPrefix>1.2.1</VersionPrefix>
     <TargetFramework>netcoreapp1.0</TargetFramework>
     <AssemblyName>JsonApiDotNetCore</AssemblyName>
     <PackageId>JsonApiDotNetCore</PackageId>