chore(deps): bump base64 from 0.22.1 to 0.23.1 (#44)

Bumps [base64](https://github.com/marshallpierce/rust-base64) from 0.22.1 to 0.23.1.
- [Changelog](https://github.com/marshallpierce/rust-base64/blob/master/RELEASE-NOTES.md)
- [Commits](marshallpierce/rust-base64@v0.22.1...v0.23.1)

---
updated-dependencies:
- dependency-name: base64
  dependency-version: 0.23.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -25,6 +25,6 @@ mockito = "1.6.1"
 # Used to mint a throwaway RSA keypair per test run, so signed-token tests need
 # no committed private key and no hardcoded expiry. Already in the dependency
 # tree via jsonwebtoken's rust_crypto backend.
-base64 = "0.22"
+base64 = "0.23"
 rand = "0.8"
 rsa = { version = "0.9", features = ["pem"] }