build(deps): bump tower from 0.4.12 to 0.4.13 (#496)

Bumps [tower](https://github.com/tower-rs/tower) from 0.4.12 to 0.4.13.
- [Release notes](https://github.com/tower-rs/tower/releases)
- [Commits](https://github.com/tower-rs/tower/compare/tower-0.4.12...tower-0.4.13)

---
updated-dependencies:
- dependency-name: tower
  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.lock

@@ -520,26 +520,6 @@ dependencies = [
  "cfg-if",
 ]
 
-[[package]]
-name = "crossbeam-channel"
-version = "0.5.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5aaa7bd5fb665c6864b5f963dd9097905c54125909c7aa94c9e18507cdbe6c53"
-dependencies = [
- "cfg-if",
- "crossbeam-utils",
-]
-
-[[package]]
-name = "crossbeam-utils"
-version = "0.8.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0bf124c720b7686e3c2663cf54062ab0f68a88af2fb6a030e87e30bf721fcb38"
-dependencies = [
- "cfg-if",
- "lazy_static",
-]
-
 [[package]]
 name = "crypto-common"
 version = "0.1.3"
@@ -1027,11 +1007,7 @@ version = "7.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "31672b7011be2c4f7456c4ddbcb40e7e9a4a9fad8efe49a6ebaf5f307d0109c0"
 dependencies = [
- "base64",
  "byteorder",
- "crossbeam-channel",
- "flate2",
- "nom 7.1.1",
  "num-traits",
 ]
 
@@ -2719,9 +2695,9 @@ dependencies = [
 
 [[package]]
 name = "tower"
-version = "0.4.12"
+version = "0.4.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9a89fd63ad6adf737582df5db40d286574513c69a11dac5214dc3b5603d6713e"
+checksum = "b8fa9be0de6cf49e536ce1851f987bd21a43b771b09473c3549a6c853db37c1c"
 dependencies = [
  "futures-core",
  "futures-util",