v60.1.0-alpha.354

Change Log

1. BUG: Fixed infinite recursion issue when using the locales zh-CN, zh-HK, zh-MO, zh-SG, zh-TW (Fixes #29).
2. Added Lazy<T> to make GetOrAdd() method calls atomic (Fixes #31).
3. Added test targets for x86 on all target frameworks.
4. Upgraded to J2N 2.0.0-beta-0012
5. Upgraded to Nerdbank.GitVersioning 3.3.37
6. Added tests for .NET 5.0
7. Removed support for .NET Standard 1.3
8. Downgraded Microsoft.Extensions.Caching.Memory to 2.0.0