Update Rust crate base64 to 0.22

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
base64	dependencies	minor	0.21 → 0.22

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Release Notes

marshallpierce/rust-base64 (base64)

v0.22.1

Compare Source

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

v0.22.0

Compare Source

• 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%)

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Configuration

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: Cargo.lock

Command failed: cargo update --config net.git-fetch-with-cli=true --manifest-path Cargo.toml --package base64@0.21.7 --precise 0.22.1
    Updating crates.io index
error: failed to select a version for the requirement `base64 = "^0.21"`
candidate versions found which didn't match: 0.22.1
location searched: crates.io index
required by package `openid v0.12.0`
    ... which satisfies dependency `openid = "^0.12"` of package `handball v0.0.0 (/tmp/renovate/repos/github/LunchTimeCode/handball)`