add serde subfeature to tiberius-config (#334)

Author: jxs

Cargo.toml

@@ -1,8 +1,9 @@
 [workspace]
+resolver = "2"
 members = [
     "refinery",
     "refinery_cli",
     "refinery_core",
     "refinery_macros",
-    "examples"
+    "examples",
 ]

refinery_core/Cargo.toml

@@ -12,7 +12,7 @@ edition = "2018"
 default = []
 rusqlite-bundled = ["rusqlite", "rusqlite/bundled"]
 tiberius = ["dep:tiberius", "futures", "tokio", "tokio/net"]
-tiberius-config = ["tiberius", "tokio", "tokio-util"]
+tiberius-config = ["tiberius", "tokio", "tokio-util", "serde"]
 tokio-postgres = ["dep:tokio-postgres", "tokio", "tokio/rt"]
 mysql_async = ["dep:mysql_async"]
 serde = ["dep:serde"]