generates names like 'AAZ' in excel maner from count of columns
const genCols = require('excel-like-column-name-generator').genColumns;
genCols(1) // outputs ['A']
genCols(676) // outputs ['A'...'AZ'...'YZ']
const genCols = require('excel-like-column-name-generator').memoizedGenColumns;
genCols(1) // outputs ['A']
genCols(676) // outputs from ['A'...'AZ'...'YZ']
const genCol = require('excel-like-column-name-generator').genSingleValue;
genCol(676) // outputs 'YZ'
genCol(1) // outputs 'A'
const parse = require('excel-like-column-name-generator').parse;
parse('YZ') // outputs 676
parse('A') // outputs 1