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Finds power-of-2.
Alternatives: pow2, pow10. Similar: log2, pow2, isPow2, nextPow2, prevPow2.
pow2(x) // x: an int32
const xinteger = require('extra-integer'); xinteger.pow2(4); // → 16 xinteger.pow2(2); // → 4 xinteger.pow2(0); // → 1