Make ISODateTime return tz-unaware datetime

The parser we use, `dateutil.parsers.isoparse` returns a timezone-
aware or timezone-unaware `datetime` object depending on whether or
not the datetime string included a timezone offset specification.

Since we can't compare tz-aware objects to tz-unaware objects it's
better to make sure our converter is consistent in the type it will
return.

For now, I've chosen to return tz-unaware datetime objects, since
`discord.py` also returns tz-unaware datetime objects when accessing
datetime-related attributes of objects. Since we're likely to compare
"our" datetime objects to discord.py-provided datetime objects, I
think that's the most parsimonious option for now.

Note: It's probably a good idea to open a larger discussion about
using timezone-aware datetime objects throughout the library to
avoid a UTC-time being interpreted as localtime. This will require
a broader discussion than this commit/PR allows, though.

0 files changed, 0 insertions, 0 deletions