Merge pull request #1143 from rust-lang/dependabot/cargo/tower-service-0.3.1

Cargo.lock

@@ -1909,9 +1909,9 @@ dependencies = [
 
 [[package]]
 name = "tower-service"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e987b6bf443f4b5b3b6f38704195592cca41c5bb7aedd3c3693c7081f8289860"
+checksum = "360dfd1d6d30e05fda32ace2c8c70e9c0a9da713275777f5a4dbb8a1893930c6"
 
 [[package]]
 name = "tracing"