chore(deps): bump base64 from 0.21.3 to 0.21.4 (#360)

Bumps [base64](https://github.com/marshallpierce/rust-base64) from 0.21.3 to 0.21.4.
- [Changelog](https://github.com/marshallpierce/rust-base64/blob/master/RELEASE-NOTES.md)
- [Commits](marshallpierce/rust-base64@v0.21.3...v0.21.4)

---
updated-dependencies:
- dependency-name: base64
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.toml

@@ -46,7 +46,7 @@ electrum-client = "0.12.0"
 reqwest = { version = "0.11.20", default-features = false, features = ["json", "rustls-tls"] }
 tonic_lnd = { version = "0.5.0", features = ["tracing"] }
 async-trait = "0.1"
-base64 = "0.21.1"
+base64 = "0.21.4"
 tempfile = "3.8.0"
 hex = "0.4.3"
 chacha20poly1305 = "0.10.1"