Merge pull request #9 from ikesyo/patch-1

Fix null.Uint64 type name in README

Author: aarondl

README.md

@@ -46,8 +46,8 @@ to JSON null if Invalid or SQL source data is null.
 | `null.Uint` | Nullable `uint` | |
 | `null.Uint8` | Nullable `uint8` | |
 | `null.Uint16` | Nullable `uint16` | |
-| `null.Uint32` | Nullable `int32` | |
-| `null.Int64` | Nullable `uint64` | | |
+| `null.Uint32` | Nullable `uint32` | |
+| `null.Uint64` | Nullable `uint64` | | |
 
 ### Bugs