- checks the supported.patchlevels prop in anykernel.sh and matches against it to prevent users flashing incorrect kernels for patch levels
- this is possibly more important than supported.versions now since modern Android doesn't really do point releases anymore, so a patch level is more likely to signify breakage than a version change
- supported.patchlevels can be a closed or open-ended range of dates in the format YYYY-MM, e.g. "2019-04 - 2019-06", "2019-04 -" or "- 2019-06" where the last two examples show setting a minimum and maximum, respectively
- clean up device and version checks a bit while we're at it
osm0sis
e4a907b745