When 'null' is in an array of tags, signature breaks

[rhwinter]

Describe the bug in a sentence or two.

When doing

tags = ['test', null];
await cloudinary.v2.uploader.replace_tag(tags, public_id, { type: "private" });

I get a "Invalid Signature" 401 error.

Issue Type (Can be multiple)

[ ] Build - Can’t install or import the SDK
[ ] Babel - Babel errors or cross browser issues
[ ] Performance - Performance issues
[X] Behaviour - Functions aren’t working as expected (Such as generate URL)
[ ] Documentation - Inconsistency between the docs and behaviour
[ ] Incorrect Types - For typescript users who are having problems with our d.ts files
[ ] Other (Specify)

Steps to reproduce

import cloudinary from 'cloudinary';
import configuration from 'somewhere';

cloudinary.config({
    ...configuration.secrets.cloudinary,
    secure: true
});

const public_id = 'some public ID here',
tags = ['test', null];
await cloudinary.v2.uploader.replace_tag(tags, public_id, { type: "private" });

Versions and Libraries (fill in the version numbers)

Cloudinary_NPM SDK version 1.33.0
Node - 19.3.0
NPM - 9.2.0

Further comments

Changing line 386 in /lib/uploader.js to

params.tag = tag.filter(t => t);

Fixes the issue, but I think the real problem lies in how clear_blank() (in /lib/utils/index.js) is implemented, but I didn't have time to dig too much deeper.