Add support for lightgbm 4

[pavelzw]

Closes #72

[pavelzw]

Let's merge this before #74 since this has a better CI setup.

[jonashaag]

You could just make SKLEARN_VERSION a matchspec

SKLEARN_VERSION: 'sklearn=1.1'
SKLEARN_VERSION: 'sklearn>0'

[github-actions]

(benchmark 5682617770 / attempt 1)
Base results / Our results / Change

Model	Size	Dump Time	Load Time
sklearn rf 20M	20.8 MiB / 3.0 MiB / 6.87 x	0.02 s / 0.05 s / 2.57 x	0.02 s / 0.04 s / 2.18 x
sklearn rf 20M lzma	6.5 MiB / 2.0 MiB / 3.26 x	15.72 s / 1.55 s / 0.10 x	0.67 s / 0.22 s / 0.33 x
sklearn rf 200M	212.3 MiB / 30.6 MiB / 6.94 x	0.15 s / 0.37 s / 2.44 x	0.19 s / 0.33 s / 1.73 x
sklearn rf 200M lzma	47.4 MiB / 14.6 MiB / 3.24 x	122.16 s / 22.45 s / 0.18 x	5.26 s / 1.73 s / 0.33 x
sklearn rf 1G	1157.5 MiB / 166.8 MiB / 6.94 x	1.10 s / 1.85 s / 1.68 x	1.14 s / 1.61 s / 1.41 x
sklearn rf 1G lzma	258.1 MiB / 98.1 MiB / 2.63 x	629.81 s / 125.72 s / 0.20 x	28.31 s / 10.30 s / 0.36 x
sklearn gb 2M	2.2 MiB / 1.1 MiB / 2.08 x	0.04 s / 0.33 s / 7.71 x	0.05 s / 0.16 s / 3.34 x
sklearn gb 2M lzma	0.6 MiB / 0.2 MiB / 3.80 x	1.18 s / 0.52 s / 0.44 x	0.11 s / 0.17 s / 1.62 x
lgbm gbdt 2M	2.6 MiB / 1.0 MiB / 2.78 x	0.11 s / 0.31 s / 2.94 x	0.02 s / 0.14 s / 9.19 x
lgbm gbdt 2M lzma	0.9 MiB / 0.5 MiB / 1.90 x	1.78 s / 0.63 s / 0.36 x	0.10 s / 0.19 s / 1.95 x
lgbm gbdt 5M	5.3 MiB / 1.9 MiB / 2.81 x	0.18 s / 0.57 s / 3.15 x	0.03 s / 0.29 s / 9.75 x
lgbm gbdt 5M lzma	1.7 MiB / 0.8 MiB / 1.96 x	4.40 s / 1.34 s / 0.30 x	0.18 s / 0.37 s / 2.03 x
lgbm gbdt 20M	22.7 MiB / 7.6 MiB / 3.00 x	0.73 s / 2.40 s / 3.28 x	0.14 s / 1.21 s / 8.78 x
lgbm gbdt 20M lzma	6.3 MiB / 3.0 MiB / 2.09 x	22.86 s / 6.02 s / 0.26 x	0.73 s / 1.46 s / 1.99 x
lgbm gbdt 100M	101.1 MiB / 33.0 MiB / 3.06 x	3.30 s / 10.44 s / 3.17 x	0.61 s / 78.19 s / 128.90 x
lgbm gbdt 100M lzma	25.6 MiB / 10.6 MiB / 2.41 x	114.62 s / 29.03 s / 0.25 x	3.01 s / 6.24 s / 2.07 x
lgbm rf 10M	10.9 MiB / 3.2 MiB / 3.46 x	0.37 s / 0.77 s / 2.08 x	0.05 s / 0.48 s / 9.30 x
lgbm rf 10M lzma	0.7 MiB / 0.4 MiB / 1.86 x	2.28 s / 1.14 s / 0.50 x	0.14 s / 0.52 s / 3.62 x