Breaking changes:
- Removed JSON/YAML reading functionality and swagger-spec now only depends on clojure.spec
Enhancements and fixes:
- Allow path key in Paths Object to be keyword (in addition to string)
- Allow mime type key in Examples Object to be keyword (in addition to string)
- Restrict extensions in Paths Object to begin with "x-" (this prevents invalid Path Item Objects to be treated incorrectly as extensions)