revert back to a range because nothing worked

Author: mythz

NuGet.Core/ServiceStack.OrmLite.MySql.Core/ServiceStack.OrmLite.MySql.Core.nuspec

@@ -18,8 +18,8 @@
     <language>en-US</language> 
     <copyright>Copyright 2016 Service Stack</copyright>
     <dependencies>
-      <group targetFramework=".NETStandard1.3">
-        <dependency id="MySql.Data" version="[7.0.6-ir31]" developmentDependency="true" />
+      <group targetFramework=".NETStandard1.6">
+        <dependency id="MySql.Data" version="[7.0.6-ir31)" />
         <dependency id="ServiceStack.Interfaces.Core" version="[1.0.0, )" />
         <dependency id="ServiceStack.Text.Core" version="[1.0.0, )" />
         <dependency id="ServiceStack.Common.Core" version="[1.0.0, )" />