v2.3

What's Changed

• Make GUI dependencies optional by @jasasonc in #33
• Fix small bugs in Gao-Moan, Jiao-Moan, Jun-Park, Goodman and psd_trim_length by @jasasonc in #37
• Validate SpectralData input and fix shape and fs checks by @jasasonc in #39
• Fix seeded time histories and Rainflow T/fs and nr_load_classes handling by @jasasonc in #38
• End the last equal-area band at the last frequency point by @jasasonc in #40
• Fix the Gao-Moan 3-band large-cycle PDF and add a bandwidth parameter option by @jasasonc in #41
• Speed up Low, Rayleigh-sum methods, ZhaoBaker PDF integration and moment calculation by @jasasonc in #43

Full Changelog: v2.2.2...v2.3