Revert: Library to NS2.0

Author: Sewer56

dolphin.memory.access/Dolphin.Memory.Access.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <PackageLicenseFile>LICENSE.md</PackageLicenseFile>
     <Description>Tiny barebones library used to access the memory of Dolphin emulator on Windows.</Description>