[BUG] 1.5.2 breaks compatibility with .NET 2.0 Standard

[ktyldev]

Describe the bug

Version 1.5.2 breaks compatibility with .NET 2.0 Standard projects due to the inclusion of a C# 8.0 feature. This should be at least a MINOR version upgrade as per semver.

To Reproduce Steps to reproduce the behavior:

1. Create a Unity project using 2020.3.38f1
2. Import ParrelSync 1.5.1
3. Confirm no compilation errors
4. Remove 1.5.1, import 1.5.2
5. Compilation error on Editor/Preferences.cs:91 due to the use of a nullable reference type.

Expected behavior

No compilation errors.

Screenshots/Video If applicable, add screenshots or video link( Youtube/Vimeo) to help explain the problem.

Enviroment (please complete the following information):

• Unity Editor Version: 2020.3.38f1
• ParrelSync Version: 1.5.2
• OS Version: Windows 11 22H2

Additional context Add any other context about the problem here.

[314pies]

duplicate #116