Planned Breaking changes for version 2.0.0

[devsnd]

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This is a record of planned breaking changes for a major version change

• [ ] The track and track_total field should return integers instead of
• [ ] The disc and disc_total fields should return integers instead of strings
• [ ] Dropping python 2.7 support e.g. usage of unicode https://github.com/devsnd/tinytag/blob/master/tinytag/tinytag.py#L211 float() casting https://github.com/devsnd/tinytag/blob/master/tinytag/tinytag.py#L336 use bytes.decode instead of codecs https://github.com/devsnd/tinytag/blob/master/tinytag/tinytag.py#L631

[devsnd]

Question from mathiascode: Should we keep exposing MP3, OGG etc interfaces directly, or only the TinyTag interface in the 2.0 release?

[mathiascode]

@devsnd I think we should mark the audio_offset variable as private. It's not available/used in several of our formats, and not very useful as-is without an additional variable like audio_size.

[mathiascode]

Useful tool for upgrading syntax: https://github.com/asottile/pyupgrade

I'll create a new branch for 2.0.0 soon, which can eventually be merged into master. I see there are some previous branches that we could use as a starting point.