Add support for type: http and schema basic or bearer in paths

[codyaray]

It looks like #19 missed a couple changes.

paths:
  /users:
    get:
      security:
        - api-key: []

components:
  securitySchemes:
    api-key:
      type: http
      scheme: basic

Without this change, no auth header is added for the above schema. Only type: basic results in an HTTP Basic Authorization header.

[ErikWittern]

@codyaray Great, thank your for this PR!