Drop lower version bounds for serde and uuid

Author: sfackler

postgres-shared/Cargo.toml

@@ -27,6 +27,6 @@ chrono = { version = "0.4", optional = true }
 eui48 = { version = "0.1", optional = true }
 geo = { version = "0.4", optional = true }
 rustc-serialize = { version = "0.3", optional = true }
-serde_json = { version = ">=0.9,<2.0", optional = true }
+serde_json = { version = "1.0", optional = true }
 time = { version = "0.1.14", optional = true }
-uuid = { version = ">=0.4,<0.6", optional = true }
+uuid = { version = "0.5", optional = true }