Update base64 requirement from 0.10 to 0.13

[dependabot-preview]

Updates the requirements on base64 to permit the latest version.

Changelog

Sourced from base64's changelog.

0.13.0

• Config methods are const
• Added EncoderStringWriter to allow encoding directly to a String
• EncoderWriter now owns its delegate writer rather than keeping a reference to it (though refs still work)
  • As a consequence, it is now possible to extract the delegate writer from an EncoderWriter via finish(), which returns Result<W> instead of Result<()>. If you were calling finish() explicitly, you will now need to use let _ = foo.finish() instead of just foo.finish() to avoid a warning about the unused value.
• When decoding input that has both an invalid length and an invalid symbol as the last byte, InvalidByte will be emitted instead of InvalidLength to make the problem more obvious.

0.12.2

• Add BinHex alphabet

0.12.1

• Add Bcrypt alphabet

0.12.0

• A Read implementation (DecoderReader) to let users transparently decoded data from a b64 input source
• IMAP's modified b64 alphabet
• Relaxed type restrictions to just AsRef<[ut8]> for main encode*/decode* functions
• A minor performance improvement in encoding

0.11.0

• Minimum rust version 1.34.0
• no_std is now supported via the two new features alloc and std.

0.10.1

• Minimum rust version 1.27.2
• Fix bug in streaming encoding (#90): if the underlying writer didn't write all the bytes given to it, the remaining bytes would not be retried later. See the docs on EncoderWriter::write.
• Make it configurable whether or not to return an error when decoding detects excess trailing bits.

0.10.0

• Remove line wrapping. Line wrapping was never a great conceptual fit in this library, and other features (streaming encoding, etc) either couldn't support it or could support only special cases of it with a great increase in complexity. Line wrapping has been pulled out into a line-wrap crate, so it's still available if you need it.
  • Base64Display creation no longer uses a Result because it can't fail, which means its helper methods for common configs that unwrap() for you are no longer needed
• Add a streaming encoder Write impl to transparently base64 as you write.
• Remove the remaining unsafe code.
• Remove whitespace stripping to simplify no_std support. No out of the box configs use it, and it's trivial to do yourself if needed: filter(|b| !b" \n\t\r\x0b\x0c".contains(b).
• Detect invalid trailing symbols when decoding and return an error rather than silently ignoring them.

0.9.3

• Update safemem

0.9.2

• Derive Clone for DecodeError.

Commits

• b4fc913 v0.13.0
• bba4c5d Merge pull request #145 from marshallpierce/mp/cleanup
• 4296732 Add docs and other cleanup
• 6bb3556 Merge pull request #144 from untitaker/invalid-bytes-not-length
• 5b40e0c Merge pull request #142 from marshallpierce/mp/string-writer
• 8b1ae22 Rename StrWrite to StrConsumer
• 27ccb65 fix tests
• d15cd38 Give better error messages when decoding data with trailing newlines
• 5a56885 Introduce StrWriter to allow ESW to wrap both a String and a &mut String
• 2dc0296 Merge pull request #143 from marshallpierce/mp/invalid-length-doc
• Additional commits viewable in compare view

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