Merge pull request rust-postgres#1242 from sfackler/dependabot/cargo/criterion-0.6

Update criterion requirement from 0.5 to 0.6

Author: sfackler

postgres/Cargo.toml

@@ -48,4 +48,4 @@ tokio-postgres = { version = "0.7.13", path = "../tokio-postgres" }
 tokio = { version = "1.0", features = ["rt", "time"] }
 
 [dev-dependencies]
-criterion = "0.5"
+criterion = "0.6"

tokio-postgres/Cargo.toml

@@ -70,7 +70,7 @@ socket2 = { version = "0.5", features = ["all"] }
 
 [dev-dependencies]
 futures-executor = "0.3"
-criterion = "0.5"
+criterion = "0.6"
 env_logger = "0.11"
 tokio = { version = "1.0", features = [
     "macros",