added "initDate" to IDatePickerConfig (#13136)

angular-ui-bootstrap/angular-ui-bootstrap-tests.ts

@@ -38,6 +38,7 @@ testApp.config((
     $datepickerConfig.formatMonth = 'M';
     $datepickerConfig.formatMonthTitle = 'yy';
     $datepickerConfig.formatYear = 'y';
+    $datepickerConfig.initDate = '1389586124979';
     $datepickerConfig.maxDate = '1389586124979';
     $datepickerConfig.maxMode = 'month';
     $datepickerConfig.minDate = '1389586124979';

angular-ui-bootstrap/index.d.ts

@@ -42,7 +42,6 @@ declare module 'angular' {
             closeOthers?: boolean;
         }
 
-
         interface IButtonConfig {
             /**
              * @default: 'active'
@@ -55,7 +54,6 @@ declare module 'angular' {
             toggleEvent?: string;
         }
 
-
         interface IDatepickerConfig {
             /**
              * Format of day in month.
@@ -155,6 +153,13 @@ declare module 'angular' {
              */
             maxDate?: any;
 
+            /**
+             * Defines the initial date, when no model value is specified.
+             * 
+             * @default null
+             */
+            initDate?: any;
+
             /**
              * An option to disable or enable shortcut's event propagation
              *