dev-deps: tide at 0.13

This fixes a forbid rust_2018_idioms issue.

Author: Fishrock123

Cargo.toml

@@ -75,5 +75,5 @@ features = [
 [dev-dependencies]
 async-std = { version = "1.6.0", features = ["unstable", "attributes"] }
 portpicker = "0.1.0"
-tide = { version = "0.9.0" }
+tide = { version = "0.13.0" }
 tokio = { version = "0.2.21", features = ["macros"] }