upgrade calendar

components/datepicker/locale.js

 import objectAssign from 'object-assign';
-import GregorianCalendarLocale from 'gregorian-calendar/lib/locale/zh_CN.js';
-import CalendarLocale from 'rc-calendar/lib/locale/zh_CN.js';
+import GregorianCalendarLocale from 'gregorian-calendar/lib/locale/zh_CN';
+import CalendarLocale from 'rc-calendar/lib/locale/zh_CN';
 import GregorianCalendarFormatLocale from 'gregorian-calendar-format/lib/locale/zh_CN';
 
 // 统一合并为完整的 Locale

package.json

@@ -38,7 +38,7 @@
     "gregorian-calendar-format": "~4.0.4",
     "object-assign": "~4.0.1",
     "rc-animate": "~2.0.0",
-    "rc-calendar": "4.0.0-alpha10",
+    "rc-calendar": "4.0.0-alpha13",
     "rc-checkbox": "~1.1.1",
     "rc-collapse": "~1.4.0",
     "rc-dialog": "~5.2.0",