gen: Emit json.RawMessage for JSON columns (#461)

Before this was only emitted for jsonb columns

Author: kyleconroy

internal/dinosql/gen.go

@@ -701,7 +701,7 @@ func (r Result) goInnerType(col core.Column, settings config.CombinedSettings) s
 		}
 		return "sql.NullBool"
 
-	case "jsonb":
+	case "json", "jsonb":
 		return "json.RawMessage"
 
 	case "bytea", "blob", "pg_catalog.bytea":

internal/endtoend/testdata/json/go/db.go

@@ -0,0 +1,9 @@
+CREATE TABLE foo (
+    a json not null,
+    b jsonb not null,
+    c json,
+    d jsonb
+);
+
+-- name: SelectFoo :exec
+SELECT * FROM foo;

internal/endtoend/testdata/json/go/models.go

@@ -0,0 +1,9 @@
+{
+  "version": "1",
+  "packages": [{
+    "path": "go",
+	"name": "querytest",
+	"schema": "query.sql",
+	"queries": "query.sql"
+  }]
+}