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Get Damerau-Levenshtein distance between strings.
const damerauLevenshteinDistance = require('@extra-string/damerau-levenshtein-distance'); // damerauLevenshteinDistance(<string-1>, <string-2>, [insertion cost=1], [deletion cost=1], [substitution cost=1], [transposition cost=1]) damerauLevenshteinDistance('gnu', 'gun'); // 1 damerauLevenshteinDistance('software', 'softwear'); // 2 damerauLevenshteinDistance('level field', 'lvele feidl', 1, 1, 1, 0.1); // 0.4