Update openapi2_conv.go (getkin#365)

Co-authored-by: Pierre Fenoll <pierrefenoll@gmail.com>

Have Header Object follow the structure of the Parameter Object (getk…

…in#355)

Clean APIs from trademarked name "Swagger" (getkin#351)

Follow callbacks references (getkin#347)

[Bugfix] fixed error message when only file is referenced (getkin#348)

without internal reference

Support loading documents with `filepath.FromSlash` (getkin#251)

[Bugfix] fail readURL on http code > 399 (getkin#345)

* [Bugfix] fail readUR
 if external reference returned http code > 399

* Replaced httpmock with httptest

* Use require.EqualError
instead testing Error and Contains of the errormessage

* Test LoadSwaggerFromData as well

repro getkin#341 (getkin#342)

openapi3: allow variables in schemes in gorillamux router + better se…

…rver variables validation (getkin#337)

introduce openapi3filter.RegisteredBodyDecoder (getkin#340)

Signed-off-by: Pierre Fenoll <pierrefenoll@gmail.com>