chore: expose type

Signed-off-by: Sri Harsha CH <sriharshach@google.com>

Author: harshachinta

google/cloud/spanner_v1/param_types.py

@@ -33,6 +33,7 @@
 TIMESTAMP = Type(code=TypeCode.TIMESTAMP)
 NUMERIC = Type(code=TypeCode.NUMERIC)
 JSON = Type(code=TypeCode.JSON)
+UUID = Type(code=TypeCode.UUID)
 PG_NUMERIC = Type(code=TypeCode.NUMERIC, type_annotation=TypeAnnotationCode.PG_NUMERIC)
 PG_JSONB = Type(code=TypeCode.JSON, type_annotation=TypeAnnotationCode.PG_JSONB)
 PG_OID = Type(code=TypeCode.INT64, type_annotation=TypeAnnotationCode.PG_OID)