PAIR: Add Shuffle #75
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Add Shuffle function, and test. After running some benchmark between
math/randShuffle andmath/rand/v2Shuffle, v2 is always slightly faster:go test -bench=. -v === RUN TestPAIR --- PASS: TestPAIR (0.00s) goos: darwin goarch: arm64 pkg: github.com/optable/match/pkg/pair BenchmarkShuffleV1 BenchmarkShuffleV1-12 100 11770306 ns/op BenchmarkShuffleV2 BenchmarkShuffleV2-12 105 11376890 ns/op PASS ok github.com/optable/match/pkg/pair 7.117s