Update DLR version

Author: slozier

Package/nuget/IronPython.nuspec

@@ -16,21 +16,21 @@
     <tags>ironpython python dynamic dlr</tags>
     <dependencies>
       <group targetFramework="net45">
-        <dependency id="DynamicLanguageRuntime" version="[1.2.3-candidate1]" />
+        <dependency id="DynamicLanguageRuntime" version="[1.2.3]" />
       </group>
       <group targetFramework="netcoreapp2.1">
         <dependency id="System.Text.Encoding.CodePages" version="4.6.0" />
         <dependency id="Microsoft.Win32.Registry" version="4.5.0" />
-        <dependency id="DynamicLanguageRuntime" version="[1.2.3-candidate1]" />
+        <dependency id="DynamicLanguageRuntime" version="[1.2.3]" />
       </group>
       <group targetFramework="netstandard2.0">
         <dependency id="System.Text.Encoding.CodePages" version="4.6.0" />
         <dependency id="Microsoft.Win32.Registry" version="4.5.0" />
-        <dependency id="DynamicLanguageRuntime" version="[1.2.3-candidate1]" />
+        <dependency id="DynamicLanguageRuntime" version="[1.2.3]" />
       </group>
       <group targetFramework="netcoreapp3.1">
         <dependency id="Microsoft.Win32.Registry" version="4.7.0" />
-        <dependency id="DynamicLanguageRuntime" version="[1.2.3-candidate1]" />
+        <dependency id="DynamicLanguageRuntime" version="[1.2.3]" />
       </group>
     </dependencies>
   </metadata>