Bump version to 1.9.0-preview

- Update AssemblyNativeVersion to 100.5.0.0.

***NO_CI***

Author: josesimoes

nanoFramework.CoreLibrary/System/AssemblyInfo.cs

@@ -12,6 +12,6 @@
 [assembly: AssemblyTitle("mscorlib")]
 [assembly: AssemblyCompany("nanoFramework Contributors")]
 [assembly: AssemblyProduct("nanoFramework mscorlib")]
-[assembly: AssemblyCopyright("Copyright © nanoFramework Contributors 2017")]
+[assembly: AssemblyCopyright("Copyright (c) .NET Foundation and Contributors")]
 
-[assembly: AssemblyNativeVersion("100.4.10.0")]
+[assembly: AssemblyNativeVersion("100.5.0.0")]

version.json

@@ -1,6 +1,6 @@
 {
   "$schema": "https://raw.githubusercontent.com/dotnet/Nerdbank.GitVersioning/master/src/NerdBank.GitVersioning/version.schema.json",
-  "version": "1.8.0-preview.{height}",
+  "version": "1.9.0-preview.{height}",
   "assemblyVersion": {
     "precision": "revision"
   },