BREAKING: EpicClient Tests and using HttpClient inside EpicClient

src/ProxyApi.Tests/EpicClientTests.cs

src/ProxyApi.Tests/ValidatorTests.cs

src/ProxyApi/ApiConnector.cs

src/ProxyApi/MetadataApiConnector.cs

src/ProxyApi/ProxyApi.csproj

src/ProxyApi/Settings.cs

src/ProxyApi/TokenValidator/CoscineValidator.cs

src/ProxyApi/TokenValidator/ITokenValidator.cs

src/ProxyApi/TokenValidator/MetadataValidator.cs

src/ProxyApi/TokenValidator/TokenValidator.cs

src/ProxyApi/TokenValidator/ValidatorBase.cs

src/ProxyApi/Utils/ApiResponse.cs

src/ProxyApi/Utils/ApiResponseFactory.cs

src/ProxyApi/Utils/CurrentWebRequest.cs

src/ProxyApi/Utils/Dynamic.cs

src/ProxyApi/Utils/EpicClient.cs

src/ProxyApi/Utils/EpicData.cs

src/ProxyApi/Utils/Exceptions/ApiRequestException.cs

src/ProxyApi/Utils/Exceptions/CustomException.cs

src/ProxyApi/Utils/IEpicClient.cs