v0.20.0

SymbolicUtils v0.20.0

Diff since v0.19.11

Closed issues:

• Problems with simplifying fractions (#433)
• Simplify does not pull out common factors from polynomials (#455)
• AbstractAnalysis not defined (#457)
• Failed to precompile in latest version. (#458)
• similarterm inconsistent with Symbolic arithmetic operations (#462)
• Q: multithreading - threads (#464)

Merged pull requests:

• Simplify printing of Term(identity, x) (#450) (@moble)
• fix nan comparison in Add & Mul. fix JuliaSymbolics/Symbolics.jl#650 (#452) (@shashi)
• Backport #452 (#453) (@shashi)
• Fix typo (#454) (@bowenszhu)
• added rule for 1^x == 1 in POW_RULES (#469) (@pagnani)
• remove nonzero_denominators from docstring (#470) (@baggepinnen)
• Fix toterm bug that omits coeff. (#471) (@sunxd3)
• Add SciML/ModelOrderReduction.jl to downstream integration test (#477) (@bowenszhu)
• Call BasicSymbolic arithmetic operations to construct similarterm (#480) (@bowenszhu)
• [wip] Unityper updates (#482) (@shashi)
• switch to Documenter (#488) (@ArnoStrouwen)