Update to latest package versions.

Author: Whathecode

global.json

@@ -1,6 +1,6 @@
 {
   "projects": [ "src", "test" ],
   "sdk": {
-    "version": "1.0.0-preview2-003121"
+    "version": "1.0.0-preview2-003131"
   }
 }

src/Whathecode.System/project.json

@@ -1,8 +1,8 @@
-{
+{
   "version": "1.0.0-*",
 
   "dependencies": {
-    "NETStandard.Library": "1.6.0"
+    "NETStandard.Library": "1.6.1"
   },
 
   "frameworks": {

test/Whathecode.System.Tests/project.json

@@ -6,25 +6,20 @@
       "include": [ "xunit.runner.json" ]
     }
   },
+  "testRunner": "xunit",
   "dependencies": {
-    "System.Runtime.Serialization.Primitives": "4.1.1",
-    "xunit": "2.1.0",
-    "dotnet-test-xunit": "1.0.0-rc2-192208-24",
+    "xunit": "2.2.0-beta4-build3444",
+    "dotnet-test-xunit": "2.2.0-preview2-build1029",
     "Whathecode.System": "1.0.0-*"
   },
-  "testRunner": "xunit",
   "frameworks": {
     "netcoreapp1.0": {
       "dependencies": {
         "Microsoft.NETCore.App": {
           "type": "platform",
           "version": "1.0.0"
         }
-      },
-      "imports": [
-        "dotnet5.4",
-        "portable-net451+win8"
-      ]
+      }
     }
   }
-}
+}