build(deps): bump base64 from 0.21.7 to 0.22.1

[dependabot[bot]]

Bumps base64 from 0.21.7 to 0.22.1.

Changelog

Sourced from base64's changelog.

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%)

Commits

• e144006 v0.22.1
• 64cca59 Merge pull request #271 from JobanSD/patch-1
• 838355e Correct BinHex 4.0 alphabet according to specifications
• bf15ccf Merge pull request #270 from marshallpierce/mp/clippy
• fc6aabe Appease clippy
• 9a518a2 Merge pull request #267 from bdura/patch-1
• d96c80f Merge branch 'marshallpierce:master' into patch-1
• 5d70ba7 Merge pull request #269 from marshallpierce/mp/decode-precisely
• efb6c00 Release notes
• 2b91084 Add some tests to boost coverage
• Additional commits viewable in compare view

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[daviddrysdale]

@dependabot rebase