Bumps [base64](https://github.com/marshallpierce/rust-base64) from 0.21.7 to 0.22.1. <details> <summary>Changelog</summary> <p><em>Sourced from <a href="https://github.com/marshallpierce/rust-base64/blob/master/RELEASE-NOTES.md">base64's changelog</a>.</em></p> <blockquote> <h1>0.22.1</h1> <ul> <li>Correct the symbols used for the predefined <code>alphabet::BIN_HEX</code>.</li> </ul> <h1>0.22.0</h1> <ul> <li><code>DecodeSliceError::OutputSliceTooSmall</code> is now conservative rather than precise. That is, the error will only occur if the decoded output <em>cannot</em> fit, meaning that <code>Engine::decode_slice</code> can now be used with exactly-sized output slices. As part of this, <code>Engine::internal_decode</code> now returns <code>DecodeSliceError</code> instead of <code>DecodeError</code>, but that is not expected to affect any external callers.</li> <li><code>DecodeError::InvalidLength</code> now refers specifically to the <em>number of valid symbols</em> being invalid (i.e. <code>len % 4 == 1</code>), rather than just the number of input bytes. This avoids confusing scenarios when based on interpretation you could make a case for either <code>InvalidLength</code> or <code>InvalidByte</code> being appropriate.</li> <li>Decoding is somewhat faster (5-10%)</li> </ul> </blockquote> </details> <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/marshallpierce/rust-base64/commit/e14400697453bcc85997119b874bc03d9601d0af"><code>e144006</code></a> v0.22.1</li> <li><a href="https://github.com/marshallpierce/rust-base64/commit/64cca59ddbb4c43244a8f38629b59960ffe36bc0"><code>64cca59</code></a> Merge pull request <a href="https://redirect.github.com/marshallpierce/rust-base64/issues/271">#271</a> from JobanSD/patch-1</li> <li><a href="https://github.com/marshallpierce/rust-base64/commit/838355e0ac5fb8237ec9b96be5edb011bff00275"><code>838355e</code></a> Correct BinHex 4.0 alphabet according to specifications</li> <li><a href="https://github.com/marshallpierce/rust-base64/commit/bf15ccf30af8bb6b1f326fffa025d7b0aaa3342f"><code>bf15ccf</code></a> Merge pull request <a href="https://redirect.github.com/marshallpierce/rust-base64/issues/270">#270</a> from marshallpierce/mp/clippy</li> <li><a href="https://github.com/marshallpierce/rust-base64/commit/fc6aabee8afaf8b2f4cfb12df4cf461bcf9b003d"><code>fc6aabe</code></a> Appease clippy</li> <li><a href="https://github.com/marshallpierce/rust-base64/commit/9a518a2d5d028068d4bf83ebf437f7a3575e640e"><code>9a518a2</code></a> Merge pull request <a href="https://redirect.github.com/marshallpierce/rust-base64/issues/267">#267</a> from bdura/patch-1</li> <li><a href="https://github.com/marshallpierce/rust-base64/commit/d96c80f242e3080a03fd1c079730e17373ef0eb6"><code>d96c80f</code></a> Merge branch 'marshallpierce:master' into patch-1</li> <li><a href="https://github.com/marshallpierce/rust-base64/commit/5d70ba7576f9aafcbf02bd8acfcb9973411fb95f"><code>5d70ba7</code></a> Merge pull request <a href="https://redirect.github.com/marshallpierce/rust-base64/issues/269">#269</a> from marshallpierce/mp/decode-precisely</li> <li><a href="https://github.com/marshallpierce/rust-base64/commit/efb6c006c75ddbe60c084c2e3e0e084cd18b0122"><code>efb6c00</code></a> Release notes</li> <li><a href="https://github.com/marshallpierce/rust-base64/commit/2b91084a31ad11624acd81e06455ba0cbd21d4a8"><code>2b91084</code></a> Add some tests to boost coverage</li> <li>Additional commits viewable in <a href="https://github.com/marshallpierce/rust-base64/compare/v0.21.7...v0.22.1">compare view</a></li> </ul> </details> <br /> [![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=base64&package-manager=cargo&previous-version=0.21.7&new-version=0.22.1)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores) Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. 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