Refactor the SDK to use the new HTTP event tracker

[marcospassos]

Summary

This PR swaps out the WebSocket implementation with an HTTP-based one for tracking events.

I've also made a fix in their pull request that was uncovered when I changed the implementation.

We have a queue that stores events in the local store in case they cannot be delivered. When the SDK is initialized again, it attempts to deliver the pending events as the first task.

However, there were two issues:

1. The key used to store the events was based on the tab ID, which meant that events tracked in one tab would not be transmitted by another tab.
2. Additionally, the PersistedQueue implementation kept a copy of the state in memory to avoid re-parsing the JSON for every read/write operation. However, changing the behavior to have a single source of truth would cause one tab to override the other. Therefore, I refactored it by removing this optimization.

Important

Before merging this PR, we need to make sure of two things:

• Testing in a real, live environment before releasing
• Confirming the correct non-retryable status codes

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

[renan628]

Amazingly simpler

[pkg-pr-new]

commit: 4dd7c1e

npm i https://pkg.pr.new/@croct/sdk@410

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[codeclimate]

Code Climate has analyzed commit 4dd7c1e and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 99.8% (-0.1% change).

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