Update guzzlehttp library

[TomatorCZ]

• I've read and understood the contribution guidelines.
• I've searched for any related issues and avoided creating a duplicate issue.

Please give us a description of what happened.

The library contains each function in its own namespace. After the prefixing(vendor prefixed), previous calls of the each function become \each call, which results in calling the global function. The newer version of the library has this bad feature fixed. (issue guzzle/promises#102)

Please describe what you expected to happen and why.

Calling right each function

How can we reproduce this behavior?

1. Download 17.3 yoast plugin
2. Navigate to src/vendor_prefixed/guzzlehttp/promises/src/functions.php line 201
3. \each call

Technical info

• If relevant, which editor is affected (or editors):

• Classic Editor
• Gutenberg
• Classic Editor plugin

• Which browser is affected (or browsers):

• Chrome
• Firefox
• Safari
• Other

Used versions

• WordPress version: 5.8.1
• Yoast SEO version: 17.3
• Gutenberg plugin version:
• Classic Editor plugin version:
• Relevant plugins in case of a bug:

• Tested with theme: