Apply fixes from StyleCI

[mechelon]

This pull request applies code style fixes from an analysis carried out by StyleCI.

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[what-the-diff]

• The diff above is a git diff of the changes made to this package.
• It shows that we have added some new files, changed existing ones and deleted others as well.
• We can see from line 2-4 in the first block that there was an addition of two lines (line 3 & 4) while removing one line (line 2). This means that we are adding use FiveamCode\LaravelNotionApi\Tests\Plugins\PestPluginHttpRecorder; and deleting use Illuminate\Support\ServiceProvider; .