[path_provider] Path provider windows updates

[stuartmorgan-g]

Description

• Adds missing iOS podspec to path_provider_windows, which was necessary to publish it (since path_provider doesn't require 1.20+)
• Requires path_provider_windows 0.0.2, not 0.0.1, in path_provider endorsement.

Related Issues

flutter/flutter#41715

Checklist

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Breaking Change

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• Yes, this is a breaking change (please indicate a breaking change in CHANGELOG.md and increment major revision).
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[stuartmorgan-g]

Added a version bump since the repo tooling requires it. (The previous version wasn't published, but it was checked in, and that's enough apparently.)