ga4: make "set [string] [object]" requests work

[AceGentile]

gtag set command can have two sets of params:

gtag('set', <object>)
gtag('set', <string>, <object>)

the latter doesn't work because of some checks in set() method requiring the first parameter to be always an object. This breaks some user-scoped custom dimensions like this one:

gtag('set', 'user_properties', {
  favorite_composer: 'Mahler',
  favorite_instrument: 'double bass',
  season_ticketholder: 'true'
});

This should fix https://github.com/codler/react-ga4/issues/34

rif. https://support.google.com/analytics/answer/12370404

[radixdt2501]

When are we planning to merge this ? @codler @AceGentile

[arisyo13]

This should be definitely merged

[jpyoda]

Any workaround? Been a while and branch has not been merged.

[ihorbond]

@codler why make a package you don't intend to maintain ? People spend their time to write code and submit PRs too.