Migrate to NuGetForUnity

[asus4]

Describe the solution you'd like

NuGetForUnity has supported the NuGet Native library since v4.2.0.

• Support for native dependencies GlitchEnzo/NuGetForUnity#631

Although some modifications are required in the C# managed code, such as this, we can use the native libraries from NuGet as there are not modified in thie repository.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.