fix: queue channel WS events until the channel is initialized

[MartinCupela]

CLA

• [ X ] Code changes are tested

Description of the changes, What, Why and How?

A channel is flagged as initialized only after channel.query call successfully returns inside channel.watch() method. The WS events for a given channel can however arrive sooner to the client than channel.query call returns. Processing WS events before the channel.query call returns leads to checking whether the channel has been initialized. If the channel was not flagged as initialized, then the code throws error.

To prevent processing WS events before the initialization has finished, this PR introduces a WS event queue for a channel. There will all the event objects be gathered until the channel is flagged as initialized. Once flagged as initialized, the queue is flushed.

[github-actions]

Size Change: +1.41 kB (0%)

Total Size: 320 kB

Filename	Size	Change
dist/browser.es.js	70.1 kB	+317 B (0%)
dist/browser.full-bundle.min.js	37.9 kB	+155 B (0%)
dist/browser.js	71.1 kB	+308 B (0%)
dist/index.es.js	70.2 kB	+317 B (0%)
dist/index.js	71.2 kB	+308 B (0%)

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