chore(deps): update base64 requirement from 0.22 to 0.23

[dependabot]

Updates the requirements on base64 to permit the latest version.

Changelog

Sourced from base64's changelog.

0.23.0

• Added more consts for preconfigured configs and engines
• Make DecodeError::InvalidLastSymbol more clear by including the decoded value
• Added SIMD-accelerated engines behind the default-on simd-unsafe feature: Simd picks the best instruction set at runtime (AVX2 on x86_64, NEON on aarch64) and falls back to the scalar GeneralPurpose engine, while Avx2 and Neon target one instruction set with no runtime detection and work in no_std. The engines support the standard and URL-safe alphabets.
• Update MSRV to 1.71.0
• Add support for custom padding symbols

0.22.1

• Correct the symbols used for the predefined alphabet::BIN_HEX.

0.22.0

• DecodeSliceError::OutputSliceTooSmall is now conservative rather than precise. That is, the error will only occur if the decoded output cannot fit, meaning that Engine::decode_slice can now be used with exactly-sized output slices. As part of this, Engine::internal_decode now returns DecodeSliceError instead of DecodeError, but that is not expected to affect any external callers.
• DecodeError::InvalidLength now refers specifically to the number of valid symbols being invalid (i.e. len % 4 == 1), rather than just the number of input bytes. This avoids confusing scenarios when based on interpretation you could make a case for either InvalidLength or InvalidByte being appropriate.
• Decoding is somewhat faster (5-10%)

0.21.7

• Support getting an alphabet's contents as a str via Alphabet::as_str()

0.21.6

• Improved introductory documentation and example

0.21.5

• Add Debug and Clone impls for the general purpose Engine

0.21.4

• Make encoded_len const, allowing the creation of arrays sized to encode compile-time-known data lengths

0.21.3

• Implement source instead of cause on Error types
• Roll back MSRV to 1.48.0 so Debian can continue to live in a time warp
• Slightly faster chunked encoding for short inputs
• Decrease binary size

0.21.2

• Rollback MSRV to 1.57.0 -- only dev dependencies need 1.60, not the main code

0.21.1

... (truncated)

Commits

• 9e9220a v0.23.0
• 870326e Merge pull request #306 from marshallpierce/mp/trailing-bits-docs
• fbec5f1 Document no trailing trailing bits
• 0a23549 Merge pull request #305 from marshallpierce/mp/edition-2021
• f10b7e2 Update deps & edition
• 9d21a59 Merge pull request #304 from marshallpierce/mp/custom-padding-rebase
• f70bad2 Support custom padding symbols
• 684d79c Merge pull request #301 from marshallpierce/mp/simd-gardening
• 5bf66f2 Merge pull request #284 from AbeZbm/add-tests
• d3831cf Followups to SIMD work
• Additional commits viewable in compare view

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