Description and usage of version is incorrect

[MikeNeilson]

The statements within

cwms-python/cwms/api.py

Line 141 in 18b34b0

def api_version_text(api_version: int) -> str:

are incorrect.

While CDA overall does have a version (the calendar data of release) the API itself is not versioned.

Data is versioned in the case of backwards incompatible changes.

This method and it's descriptive text imply the entire API is versioned - this is not correct.

[MikeNeilson]

Additional the plain formats "application/json" now provide the latest variant of data by default.