Adds the ability to make thumbnails square, both file and embedded. Usage:
```
my_preset:
square_thumbnail: True
```
Will soon enable this by default for all music-based presets with a toggle to disable.
Huge thanks to @Kentaro1043 for crafting the ffmpeg command for this!
Closes https://github.com/jmbannon/ytdl-sub/issues/383
Adds the ability to toggle whether to use `upload_date` or `release_date` in the date_range plugin, which is used to cull older videos.
```
date_range:
type: "upload_date"
```
If using the Only Recent preset, it will be automatically applied based on whether your season/episode ordering uses release date or upload date.
Closes https://github.com/jmbannon/ytdl-sub/issues/1182
Implements https://github.com/jmbannon/ytdl-sub/issues/1182
Adds the ability to change the `keep_files_date_eval` (traditionally upload_date_standardized) to any date, so long as its in the form of YYYY-MM-DD.
Will be able to use this to have episodes get deleted based on their release_date or epoch_date, instead of their upload_date.
