v0.15.4

ClassicalOrthogonalPolynomials v0.15.4

Diff since v0.15.3

Merged pull requests:

• Bump actions/checkout from 4 to 5 (#243) (@dependabot[bot])
• Support Jacobi(-1,0)\Ultraspherical(-1/2) and Jacobi(0,-1) (#245) (@DanielVandH)
• sampling, extrema (#242) and preliminary support orthogonalising quasimatrices (#246) (@dlfivefifty)

Closed issues:

• Issue with LanczosPolynomial After Julia Update (#240)
• (If in scope) add extrema (#242)