chore: rm deprecated functions

[mahboubii]

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Description of the pull request

Breaking Changes

• client.setUser() function is removed in favor of client.connectUser()
• client.setAnonymousUser() function is removed in favor of client.connectAnonymousUser()
• client.updateUser() function is removed in favor of client.upsertUser()
• client.updateUsers() function is removed in favor of client.upsertUsers()
• client._userAgent() function is removed in favor of client.getUserAgent()

[github-actions]

Size Change: -754 B (0%)

Total Size: 213 kB

Filename	Size	Change
dist/browser.es.js	46.1 kB	-163 B (0%)
dist/browser.full-bundle.min.js	27.2 kB	-75 B (0%)
dist/browser.js	46.7 kB	-177 B (0%)
dist/index.es.js	46.2 kB	-165 B (0%)
dist/index.js	46.7 kB	-174 B (0%)

_{compressed-size-action}

[ferhatelmas]

🌮