Add assertions for request methods

[rafaelmfonseca]

Hi, i've added some assertions for request methods.

[StefH]

@rafaelmfonseca
Thank you,

However, one test fails:
Failed WireMock.Net.Tests.FluentAssertions.WireMockAssertionsTests.HaveReceivedACall_UsingConnect_WhenACallWasMadeUsingConnect_Should_BeOK [6 ms]
Error Message:
System.Net.Http.HttpRequestException : CONNECT request must contain Host header.

[rafaelmfonseca]

@StefH
Thanks!
I've fixed the UsingConnect() test, except for net452, it's like HttpClient is not sending the request using the method "CONNECT"... I tried a lot of thing but it didn't work. It's weird because with NET461+ it's working, so I assume some internal code of HttpClient changed from NET452 to NET461. Do you have any ideas?

(maybe because "CONNECT" it's a two-way communication, works like a tunnel)