* housekeeping: `.js` -> `.jsx` where necessary

* add tests for example feature
* refactor ParameterRow value setter logic
* aside: fix property access in sampleFromSchema
* prioritize media type examples for OAS3 responses
* use `example` in schema level example
* refactor: move stringify to utils
* prioritize media type examples in OAS3 request bodies
* modify nightwatch config
* fix parameter/response regressions
* reorder and broaden default value sources
* update lockfile

* allow param update by identity + hashed value storage

* add specActions.changeParamByIdentity

* add identity-based lookup support in spec selectors

* migrate `changeParam` usage to `changeParamByIdentity`

* migrate usage of `parameterWithMeta` to `parameterWithMetaByIdentity`

* update invocations of `changeParamByIdentity` to match fn signature

* use OrderedMap throughout hash-based selectors for consistency

* normalize usage of ParameterRow `onChange`

* migrate bug 4557 tests to reflect new ParameterRow interface

* remove exclusive test blocks

* linter fixes

* copy Parameters changes into OAS3 wrapper

* use rawParam for meta lookups in ParameterRow

* add test cases

* refactor default setters into own function

* reach into `schema` for default value in OAS3

* remove exclusive test