Rename osx-universal to osx

Author: roeyskoe

deps/cimgui/osx-universal/cimgui.dylib renamed to deps/cimgui/osx/cimgui.dylib

@@ -41,8 +41,8 @@
       <PackagePath>runtimes/linux-x64/native/libcimgui.so</PackagePath>
       <Pack>true</Pack>
     </Content>
-    <Content Include="..\..\deps\cimgui\osx-universal\cimgui.dylib">
-      <PackagePath>runtimes/osx-universal/native/libcimgui.dylib</PackagePath>
+    <Content Include="..\..\deps\cimgui\osx\cimgui.dylib">
+      <PackagePath>runtimes/osx/native/libcimgui.dylib</PackagePath>
       <Pack>true</Pack>
     </Content>
     <Content Include="build\net40\ImGui.NET.targets">