Cannot generate when OpenAPI is written in YAML 1.2 #257

OpenAPI recommends using YAML 1.2 where one of the differences is a smaller range of allowed strings to represent a boolean.

We have an API in production with something like:

/v1/image/{x}/{y}.png:
  parameters:
    - name: x
      in: path
      required: true
      schema:
        type: number
    - name: y
      in: path
      required: true
      schema:
        type: number

Where the y is a string. We use x and y here to represent coordinates. The oapi-codegen tool does not parse this, it sees the y as a boolean. The API is parsed correctly by other libraries.

error loading swagger spec
: error unmarshaling JSON: Error while unmarshalling property 'paths' (*openapi3.Paths): Error while unmarshalling property 'parameters' (*openapi3.Parameters): Error while unmarshalling property 'name' (*string): json: cannot unmarshal bool into Go value of type string
make: *** [Makefile:19: openapi] Error 1

This is (probably) because of a dependency on gopkg.in/yaml.v2 both directly and indirectly via github.com/getkin/kin-openapi => github.com/ghodss/yaml => gopkg.in/yaml.v2.

YAML 1.2 is not supported in v2 of this library. Support for YAML 1.2 was added in v3.

I attempted to switch everything to use v3, and it does compile, but I got the same error. Perhaps I missed some use of v2 somewhere. Unfortunately I don't have much more time to spend on this because I can simply put the y in quotes and it will compile.

However it would be nice to consume our production APIs without the need to modify them first!