cargo: bump axum from 0.5.15 to 0.5.16

Bumps [axum](https://github.com/tokio-rs/axum) from 0.5.15 to 0.5.16.
- [Release notes](https://github.com/tokio-rs/axum/releases)
- [Changelog](https://github.com/tokio-rs/axum/blob/main/CHANGELOG.md)
- [Commits](https://github.com/tokio-rs/axum/compare/axum-v0.5.15...axum-v0.5.16)

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

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

Cargo.lock

@@ -236,9 +236,9 @@ checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
 [[package]]
 name = "axum"
-version = "0.5.15"
+version = "0.5.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9de18bc5f2e9df8f52da03856bf40e29b747de5a84e43aefff90e3dc4a21529b"
+checksum = "c9e3356844c4d6a6d6467b8da2cffb4a2820be256f50a3a386c9d152bab31043"
 dependencies = [
  "async-trait",
  "axum-core",

deltachat-jsonrpc/Cargo.toml

@@ -27,7 +27,7 @@ typescript-type-def = { version = "0.5.3", features = ["json_value"] }
 tokio = { version = "1.19.2" }
 
 # optional dependencies
-axum = { version = "0.5.9", optional = true, features = ["ws"] }
+axum = { version = "0.5.16", optional = true, features = ["ws"] }
 env_logger = { version = "0.9.1", optional = true }
 walkdir = "2.3.2"