Merge pull request #5112 from ozum/master

tsrange data type is added.

changelog.md

 # Future
+- [ADDED] PostgreSQL tsrange (Range of timestamp without time zone) data type support.
 - [FIXED] attributes from multiple scopes does not merge  [#4856](https://github.com/sequelize/sequelize/issues/4856)
 - [FIXED] Support Unicode strings in mssql [#3752](https://github.com/sequelize/sequelize/issues/3752)
 

lib/data-types.js

@@ -617,7 +617,8 @@ var pgRangeSubtypes = {
   bigint: 'int8range',
   decimal: 'numrange',
   dateonly: 'daterange',
-  date: 'tstzrange'
+  date: 'tstzrange',
+  datenotz: 'tsrange'
 };
 
 RANGE.prototype.key = RANGE.key = 'RANGE';