update core CLI to .net core 2.1 and nuget packages.

BrittleFishCore/BrittleFishCore.fsproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>netcoreapp2.1</TargetFramework>
     <Authors>Craig Oates</Authors>
     <Product>Brittle Fish Core</Product>
     <Description>A demo. console program for showing how Console.Waterworks.Core works in a F# console program. Type help for a list of available commands.</Description>
@@ -23,7 +23,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Console.Waterworks.Core" Version="1.0.0-alpha" />
+    <PackageReference Include="Console.Waterworks.Core" Version="1.0.0" />
   </ItemGroup>
 
   <ItemGroup>