chore(deps): drop deprecated boolean module

[thisislawatts]

Inlines the boolean module to address #70. Code repository is no longer available, code sourced via npm registry.

[thisislawatts]

Checking in on this, @gajus is this something you would be open to reviewing?

[ghost]

Came here to see if this is being addressed. 👍 for the PR.

However, it should be noted that this function only parses for truthy and truthy-like values; which means it is not a parse boolean function since anything not truthy/truthy-like is just false. (may be rename to parseTruthy later and update references in codebase)

• Is the code and intent only to parse the possible truthy/truthy-like values?
• Did the original boolean package do the same?

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I tried testing it for weird values like { valueOf: () => 1 } and new Number(1) and new Number(0) It seems to work correctly.