update SymPy
- drops support for v0.6
- edits to make v0.7 and v1.0 work: involves some removals/degradations
min
andmax
degradation;ifelse
removal;base
on v0.7; genericSymmetric
doesn't work on matrices;sympy""
degradation
min
and max
degradation; ifelse
removal; base
on v0.7; generic Symmetric
doesn't work on matrices; sympy""
degradation