Any string from environment variable casts to True, even "false"

[MartinBernstorff]

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Example Code

MRE repo: https://github.com/MartinBernstorff/typer-false-envvar-repro

Description

I would expect an envvar with value "false" to be resolved to False.

Operating System

macOS

Operating System Details

No response

Typer Version

0.16.0

Python Version

Tested with 3.13, 3.12, 3.11

Additional Context

Thanks a ton for the work you guys do! Love Typer; hope this MRE is easy to follow.