fix(queryTypes): use enums instead of object for ambient context (#141)

Author: modulitos

lib/query-types.d.ts

@@ -1,16 +1,16 @@
-
-export = {
-  SELECT: 'SELECT',
-  INSERT: 'INSERT',
-  UPDATE: 'UPDATE',
-  BULKUPDATE: 'BULKUPDATE',
-  BULKDELETE: 'BULKDELETE',
-  DELETE: 'DELETE',
-  UPSERT: 'UPSERT',
-  VERSION: 'VERSION',
-  SHOWTABLES: 'SHOWTABLES',
-  SHOWINDEXES: 'SHOWINDEXES',
-  DESCRIBE: 'DESCRIBE',
-  RAW: 'RAW',
-  FOREIGNKEYS: 'FOREIGNKEYS'
-};
+declare enum QueryTypes {
+  SELECT = 'SELECT',
+  INSERT = 'INSERT',
+  UPDATE = 'UPDATE',
+  BULKUPDATE = 'BULKUPDATE',
+  BULKDELETE = 'BULKDELETE',
+  DELETE = 'DELETE',
+  UPSERT = 'UPSERT',
+  VERSION = 'VERSION',
+  SHOWTABLES = 'SHOWTABLES',
+  SHOWINDEXES = 'SHOWINDEXES',
+  DESCRIBE = 'DESCRIBE',
+  RAW = 'RAW',
+  FOREIGNKEYS = 'FOREIGNKEYS',
+}
+export = QueryTypes;