fix(deps): update rust crate base64 to 0.22.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
base64	dependencies	minor	0.21.5 -> 0.22.0

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Release Notes

marshallpierce/rust-base64 (base64)

v0.22.0

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• 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%)

v0.21.7

Compare Source

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

v0.21.6

Compare Source

• Improved introductory documentation and example

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Configuration

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♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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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@0.21.5 --precise 0.22.0
    Updating crates.io index
error: failed to select a version for the requirement `base64 = "^0.21"`
candidate versions found which didn't match: 0.22.0
location searched: crates.io index
required by package `reqwest v0.11.22`
    ... which satisfies dependency `reqwest = "^0.11.22"` (locked to 0.11.22) of package `webhook-handler v0.1.0 (/tmp/renovate/repos/github/KisaragiEffective/webhook-handler)`
perhaps a crate was updated and forgotten to be re-vendored?

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