Log Message:
py-uncompyle6: updated to 3.6.6

3.6.6: 2020-4-20 Love in the time of Cholera

The main reason for this release is an incompatablity bump in xdis which handles \ 
3.7 SipHash better.

Go over "yield" as an expression precidence
Some small alignment with code in decompyle3 for "or" and \ 
"and" was done