Known nasty issues in present github version of 2.0.0

[SpenceKonde]

If it's not here, I don't know about it.

1. tiny841, 441, 828 ( the ones with neither hardware twi master nor a USI) are not recognized by wire. Impact: Wire.h does not work on affected devices. Status of core on these devices not well understood because most of CI skipped.
2. ~tiny85,45,25 have LED_BUILTIN defined twice (non fatal but produces a massive volume of warnings) and were pulling in the wrong version of turnOffPWM (one which has TCCR1D due to a copy-paste error when updating the variant file). Impact Compilation is unsuccessful for all tinyAVR x5 parts~ Corrected.
3. ~tiny2313 is not being tested due to a defect in the test. Impact: Status of core unknown on this part.~ corrected
4. ~88 for micronucleus fails to find it's variant file. Impact: Cannot compile any sketch on affected devices.~ corrected
5. 26 fails because it's insisting on checking the PLL clock at 16.5, even though I'm attempting to tell it not to. Impact: Status of core unknown on this part.
6. 861 micronucleus fails because it for some reason is missing the 16.5 PLL option, which it should have. Impact: Status of core unknown on this part. No 16.5 MHz pll option available.
7. ~ATtinyx5 is failing CI tests because examples that require a valid pin don't work because they're set to use pins that are~ Corrected

Big features:

• Urboot not yet tested and hopefully adopted
• Avrdude 7.1 not yet adopted, which is a prerequisite for dumping optiboot for urboot, which I would dearly like to do due to the serious bug in the virtual bootloader.

[SpenceKonde]

Clearly nobody paying attention, closing. But the ony things left I think are the big issues.