FIX: Typo

src/Connection.jl

@@ -100,7 +100,7 @@ mutable struct _Configuration
 
     function _Configuration(managed_by_julia::Bool = false)
         config = new()
-        config._deletable(false)
+        config._deletable = false
         if managed_by_julia
             # Only append a finalizer for this if the object is
             # actually managed by Julia and not created and destroyed