fix: handle URLSearchParams.size missing in slightly older browsers

[freeatnet]

Motivation and Context

Fixes #317

Some slightly older browsers, such as Safari <17 and Chrome <113, do not support URLSearchParams.size. urlParams.size > 0, the check for whether a URLSearchParams object contains any data, returns false in these browsers, causing the code to treat these params objects as empty and resulting in search and hash elements of the URL being erased when initializing a Web3Auth instance.

Description

This PR changes the comparison from u.size > 0 to u.size !== 0, which evaluates to false only if attribute size exists and the object doesn't contain any data.

How has this been tested?

The change was tested in Safari for iOS 16.4 and 17, macOS Safari 16 and 17, and Android Chrome 128 by signing into a web3auth client application that uses search and hash params to pass dapp data.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project. (run lint)
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[chaitanyapotti]

lgtm