Fix falsy args filtering

[insolite]

Currently, this expression

yup-ast/source/ast.generator.js

Line 129 in 80f91ca

if (convertedArguments.filter(i => i).length < 1) {

is filtering out falsy values like 0, '', null, false, etc.

This means that:

transformAll(
  [["yup.number"], ["yup.min", 0]]
).validateSync(42)

AR

Will fail with the message

ValidationError: this must be greater than or equal to undefined

ER

Will succeed, returning the 42 value.

Thoughts

I assume that it's supposed to skip only undefined values instead so I created this PR. Please correct me if I'm wrong. Thank you!

You can check that the new test with 0 fails if you remove the !== undefined part.

[tavurth]

Thanks for the PR, unfortunately it seems like the company I used to work at which owns the copyright here is defunct and they're not accepting PRs.

I think it's probably OK to make a fork of this repo, but I can't be sure of that until they accept my PR with the license