Release 5.0.0-beta.15

• update readme with latest benchmarks (619e7e3)
• update README (5f79349)
• remove custom isSameValueZero in favor of native Object.is (de4062d)
• use cli table (867b875)
• update README with new benchmark results (6fc7e9d)
• final cleanup of benchmark to use tinybench (794c52e)
• ensure index is passed to isKeyItemEqual (917b5ef)