feat!: drop support for Node.js 20.x and 25.x #188

Job	Run time
Test on Node.js / prepare-node-matrix	5s
Test on Node.js / test (22)	21s
Test on Node.js / test (24)	31s
Test on Node.js / test (25, experimental)	24s
Test on Node.js / test (26, experimental)	6s
	1m 27s

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