dotnetPackages.MaxMindGeoIP2: init at 2.3.1

pkgs/top-level/dotnet-packages.nix

@@ -109,6 +109,13 @@ let self = dotnetPackages // overrides; dotnetPackages = with self; {
     outputFiles = [ "lib/*" ];
   };
 
+  MaxMindGeoIP2 = fetchNuGet {
+    baseName = "MaxMind.GeoIP2";
+    version = "2.3.1";
+    sha256 = "1s44dvjnmj1aimbrgkmpj6h5dn1w6acgqjch1axc76yz6hwknqgf";
+    outputFiles = [ "lib/*" ];
+  };
+
   NUnitRunners = fetchNuGet {
     baseName = "NUnit.Runners";
     version = "2.6.4";