v0.13.6

ClassicalOrthogonalPolynomials v0.13.6

Diff since v0.13.5

Merged pull requests:

• Test that diff(T[:,1:5]) * randn(5) returns an Expansion instead of a… (#200) (@dlfivefifty)
• Missing @test (#201) (@DanielVandH)
• Simplify a few expressions (#205) (@putianyi889)
• Assume NoSingularities by default in expand (#208) (@dlfivefifty)

Closed issues:

• Multithreading Legendre transform (#204)