Merge pull request #9 from cbgbt/dependabot/cargo/tower-0.5

Update tower requirement from 0.4 to 0.5

Author: cbgbt

tower-cgi/Cargo.toml

@@ -8,7 +8,7 @@ license = "Apache-2.0"
 cgi-rs = { path = "../cgi-rs" }
 hyper = { version = "0.14", default-features = false }
 snafu = "0.8"
-tower = { version = "0.4", default-features = false, features = ["util"] }
+tower = { version = "0.5", default-features = false, features = ["util"] }
 
 [dev-dependencies]
 axum = "0.6"