v2.0.1

• Better usage of Task and async
• Removed a unecessary try-catch block
• GenerateLibraryToken() now returns the status code in case of an error a bit better
• Made HTTPClient read only
• Moved DotNetEnv.Env.Load() from Main() in Program.cs to Load() in EnvVars.cs
• Removed the SERVER_PORT and SERVER_BASE_URL environment variables (unused)