Invalid dev version identifiers in setup.py

[con-f-use]

There is a bunch of invalid version matchers in setup.py. PEP 440 states:
(edit: they are not, after all, invalid - it's just hidden in the PEP and distlib doesn't parse them correctly)

The canonical public version identifiers MUST comply with the following scheme:
[N!]N(.N)*[{a|b|rc}N][.postN][.devN]

So you are missing a dot and a number in every version identifier that contains the string dev.

It is also considered bad practice to have an upper bound on package versions and installers like pip do not typically consider development versions in any case (unless explicitly told to).

See: googleapis/google-api-python-client#2151

[con-f-use]

Discussion in: googleapis/python-api-core#504