Fixed bug with mono 3.12 (HttpClient.BaseAddress) - Exception invalid protocol
Fixed bug with mono 3.12 (HttpClient.BaseAddress) - Exception invalid protocol

kenlefeb/sendgrid-csharp,FriskyLingo/sendgrid-csharp,brcaswell/sendgrid-csharp,brcaswell/sendgrid-csharp,kenlefeb/sendgrid-csharp,dubrovkinmaxim/sendgrid-csharp,sendgrid/sendgrid-csharp,FriskyLingo/sendgrid-csharp,dubrovkinmaxim/sendgrid-csharp,sumeshthomas/sendgrid-csharp,sumeshthomas/sendgrid-csharp,sendgrid/sendgrid-csharp,sendgrid/sendgrid-csharp