Bug: different result for -x1 and -1x when -x and -1 are both booleans

[b1f6c1c4]

> require('yargs-parser')(['-x1'], { boolean: ['x', '1'] })
{ _: [], x: false }
> require('yargs-parser')(['-1x'], { boolean: ['x', '1'] })
{ '1': true, _: [], x: true }

What I'm looking for is to both get { '1': true, _: [], x: true }, because -x and -1 are both boolean switches and 1 is NOT just an argument for -x.

[QmarkC]

Quick triage, looks like the issue is in L270-L276:

        // current letter is an alphabetic character and next value is a number
        if (/[A-Za-z]/.test(letters[j]) &&
          /^-?\d+(\.\d*)?(e-?\d+)?$/.test(next)) {
          setArg(letters[j], next)
          broken = true
          break
        }

Adding a check to see if next is a boolean alias seems to fix it and doesn't break any existing tests.

        // current letter is an alphabetic character and next value is a number
        if (/[A-Za-z]/.test(letters[j]) &&
          /^-?\d+(\.\d*)?(e-?\d+)?$/.test(next) &&
          checkAllAliases(next, flags.bools) === false) {
          setArg(letters[j], next)
          broken = true
          break
        }

const parse1 = parser(['-x1'], { boolean: ['x', '1'] })
console.log(parse1)
// { '1': true, _: [], x: true }

const parse2 = parser(['-1x'], { boolean: ['x', '1'] })
console.log(parse2)
// { '1': true, _: [], x: true }

[b1f6c1c4]

@QmarkC This solution seems good and could you please make a PR?

[QmarkC]

@QmarkC This solution seems good and could you please make a PR?

@b1f6c1c4 I can look into this further after the TypeScript refactor #285 is merged.

[b1f6c1c4]

@QmarkC Hi, could you please have a look at this?