Bump base64 from 0.13.0 to 0.21.0

Bumps [base64](https://github.com/marshallpierce/rust-base64) from 0.13.0 to 0.21.0.
- [Release notes](https://github.com/marshallpierce/rust-base64/releases)
- [Changelog](https://github.com/marshallpierce/rust-base64/blob/master/RELEASE-NOTES.md)
- [Commits](https://github.com/marshallpierce/rust-base64/compare/v0.13.0...v0.21.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.lock

@@ -86,7 +86,7 @@ dependencies = [
 name = "alfis"
 version = "0.8.4"
 dependencies = [
- "base64 0.20.0",
+ "base64 0.21.0",
  "bincode",
  "blakeout",
  "byteorder",
@@ -164,9 +164,9 @@ checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
 
 [[package]]
 name = "base64"
-version = "0.20.0"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0ea22880d78093b0cbe17c89f64a7d457941e65759157ec6cb31a31d652b05e5"
+checksum = "a4a4ddaa51a5bc52a6948f74c06d20aaaddb71924eab79b8c97a8c556e942d6a"
 
 [[package]]
 name = "bincode"

Cargo.toml

@@ -29,7 +29,7 @@ serde = { version = "1.0.144", features = ["derive"] }
 serde_json = "1.0.85"
 bincode = "1.3.3"
 serde_cbor = "0.11.2"
-base64 = "0.20.0"
+base64 = "0.21.0"
 num-bigint = "0.4.3"
 num-traits = "0.2.15"
 chrono = { version = "0.4.20", features = ["serde"] }