Bump base64 from 0.21.3 to 0.21.4

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>

crates/erooster_core/Cargo.toml

@@ -16,7 +16,7 @@ bench = false
 [dependencies]
 argon2 = { version = "0.5.1", features = ["std"] }
 async-trait = "0.1.64"
-base64 = "0.21.3"
+base64 = "0.21.4"
 bytes = "1.4.0"
 cfg-if = "1.0.0"
 color-eyre = "0.6.2"

crates/erooster_imap/Cargo.toml

@@ -15,7 +15,7 @@ bench = false
 
 [dependencies]
 async-trait = "0.1.64"
-base64 = "0.21.3"
+base64 = "0.21.4"
 color-eyre = "0.6.2"
 const_format = "0.2.30"
 erooster_core = { version = "0.1.0", path = "../erooster_core" }

crates/erooster_smtp/Cargo.toml

@@ -17,7 +17,7 @@ bench = false
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-base64 = "0.21.3"
+base64 = "0.21.4"
 color-eyre = "0.6.2"
 erooster_core = { version = "0.1.0", path = "../erooster_core" }
 futures = { version = "0.3.25", features = ["thread-pool"] }