Release 0.11.3

A patch release addressing the following:

• Fixed:
  • compatibility with matplotlib 3.8
  • skipping important phase advances for HL-LHC (as not defined yet)
  • allowing responses with delta_k < 1e-6 for full-response creation

What's Changed

• fixing plot_spectrum by @JoschD in #429
• Hl fixes by @awegsche in #428

Full Changelog: 0.11.2...0.11.3