[#3] Move to netstandard 2.0

Signed-off-by: Pavel Gross <p.gross@yadro.com>

src/FrostFS.SDK.Cryptography/AssemblyInfo.cs

@@ -0,0 +1,20 @@
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// In SDK-style projects such as this one, several assembly attributes that were historically
+// defined in this file are now automatically added during build and populated with
+// values defined in project properties. For details of which attributes are included
+// and how to customise this process see: https://aka.ms/assembly-info-properties
+
+
+// Setting ComVisible to false makes the types in this assembly not visible to COM
+// components.  If you need to access a type in this assembly from COM, set the ComVisible
+// attribute to true on that type.
+
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM.
+
+[assembly: Guid("08a8487e-39ce-41fb-9c24-13f73ff2bde0")]
+
+[assembly: InternalsVisibleToAttribute("FrostFS.SDK.Cryptography.Test")]