Update rustls-pemfile requirement from 1.0.3 to 2.0.0

[dependabot[bot]]

Updates the requirements on rustls-pemfile to permit the latest version.

Release notes

Sourced from rustls-pemfile's releases.

2.0.0

Headlines

• Improving API stability. This crate now uses types from rustls-pki-types; we expect this to reduce the number of breaking changes in rustls ecosystem.
• no_std support. This crate can now work optionally without std: use the new read_one_from_slice API.

What's Changed

• Switch to using the pki-types crate by @​djc in rustls/pemfile#24
• Bump version to 2.0.0-alpha.0 by @​djc in rustls/pemfile#25
• 2.0.0-alpha.1: take pki-types 0.2 by @​ctz in rustls/pemfile#26
• Add private_key() helper by @​djc in rustls/pemfile#27
• Bump actions/checkout from 3 to 4 by @​dependabot in rustls/pemfile#28
• Allow additionally parsing \r newlines in PEM files by @​complexspaces in rustls/pemfile#30
• add no-std support by @​japaric in rustls/pemfile#29
• Bump version to alpha.2 by @​djc in rustls/pemfile#33

New Contributors

• @​dependabot made their first contribution in rustls/pemfile#28
• @​japaric made their first contribution in rustls/pemfile#29

Full Changelog: https://github.com/rustls/pemfile/compare/v/1.0.4...v/2.0.0

Commits

• e0da4ce Bump to v2.0.0
• 12b9d79 Use pki-types v1
• 48790bc Bump version to alpha.2
• 3aa829c add an opt-out std feature
• 0227a3a add read_one_from_slice
• 6e36748 introduce an Error enum
• b3c85f1 refactor read_one's loop body into a separate function
• 2c2f1ab switch from std::prelude to core::prelude
• 4cade3f Allow additionally parsing \r newlines in PEM files
• c726146 Bump actions/checkout from 3 to 4
• Additional commits viewable in compare view

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[Gsantomaggio]

@wolf4ood @DanielePalaia WDYT?