build(deps): bump base64 from 0.21.3 to 0.21.4 in /oracle-scripts (#130)

Bumps [base64](https://github.com/marshallpierce/rust-base64) from 0.21.3 to 0.21.4.
<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>0.21.4</h1>
<ul>
<li>Make <code>encoded_len</code> <code>const</code>, allowing the creation of arrays sized to encode compile-time-known data lengths</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/marshallpierce/rust-base64/commit/b88fd5bfdcc44409491cdb28105f660f09e08711"><code>b88fd5b</code></a> v0.21.4</li>
<li><a href="https://github.com/marshallpierce/rust-base64/commit/c70a8962d76615444ea2d9cc6d8874728eb9c3d9"><code>c70a896</code></a> Merge pull request <a href="https://redirect.github.com/marshallpierce/rust-base64/issues/252">#252</a> from marshallpierce/mp/const-encoded_len</li>
<li><a href="https://github.com/marshallpierce/rust-base64/commit/59048ffae7f7057de52048db3491a033cd94a052"><code>59048ff</code></a> Make encoded_len const</li>
<li>See full diff in <a href="https://github.com/marshallpierce/rust-base64/compare/v0.21.3...v0.21.4">compare view</a></li>
</ul>
</details>
<br />


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</details>

oracle-scripts/Cargo.toml

@@ -15,4 +15,4 @@ wasm-bindgen = "0.2.87"
 
 [dev-dependencies]
 hex = "0.4.3"
-base64 = "0.21.3"
+base64 = "0.21.4"