Use `const`, `let` and `===`

[hugovk]

• Use const or let instead of var (info)
• Use '===' to avoid unexpected type coercion (info)
• Fix a typo

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:books: Documentation preview :books:: https://readthedocs-preview--22.org.readthedocs.build/en/22/

[hugovk]

No need to release this now, it's more about best practices which may help catch some gotchas in the future. 👍

[humitos]

Awesome! Thanks again. I'm going to merge it now then, and it will be included in the next release.