bump proptest to 1.0.0

Author: patrickfreed

Cargo.toml

@@ -57,7 +57,7 @@ serde_bytes = "0.11.5"
 assert_matches = "1.2"
 criterion = "0.3.0"
 pretty_assertions = "0.6.1"
-proptest = "0.10"
+proptest = "1.0.0"
 serde_bytes = "0.11"
 chrono = { version = "0.4", features = ["serde"] }