fix(aot): AOT build failing after adding string data support

ERROR in ../angular-bootstrap-datetimepicker/angular-bootstrap-datetimepicker.ts(104,9): Error
during template compile of 'DlDateTimePickerStringModule’. Function calls are not supported in
decorators but 'localeData' was called.

Fixes #429

src/lib/dl-date-time-picker/dl-date-time-picker.module.ts

@@ -39,6 +39,24 @@ import * as _moment from 'moment';
  **/
 const moment = _moment;
 
+/**
+ * `Moment`'s long date format `lll` used as the default output format
+ * for string date's
+ */
+export const LONG_DATE_FORMAT = moment.localeData().longDateFormat('lll');
+
+/**
+ *  Default input format's used by `DlDateAdapterString`
+ */
+export const INPUT_FORMATS = [
+  'YYYY-MM-DDTHH:mm',
+  'YYYY-MM-DDTHH:mm:ss',
+  'YYYY-MM-DDTHH:mm:ss.SSS',
+  'YYYY-MM-DD',
+  LONG_DATE_FORMAT,
+  moment.ISO_8601
+];
+
 /**
  * Import this module to supply your own `DateAdapter` provider.
  * @internal
@@ -99,17 +117,8 @@ export class DlDateTimePickerMomentModule {
   imports: [DlDateTimePickerModule],
   exports: [DlDateTimePickerComponent],
   providers: [
-    {
-      provide: DL_STRING_DATE_INPUT_FORMATS, useValue: [
-        moment.localeData().longDateFormat('lll'),
-        'YYYY-MM-DDTHH:mm',
-        'YYYY-MM-DDTHH:mm:ss',
-        'YYYY-MM-DDTHH:mm:ss.SSS',
-        'YYYY-MM-DD',
-        moment.ISO_8601
-      ]
-    },
-    {provide: DL_STRING_DATE_OUTPUT_FORMAT, useValue: moment.localeData().longDateFormat('lll')},
+    {provide: DL_STRING_DATE_INPUT_FORMATS, useValue: INPUT_FORMATS},
+    {provide: DL_STRING_DATE_OUTPUT_FORMAT, useValue: LONG_DATE_FORMAT},
     {provide: DlDateAdapter, useClass: DlDateAdapterString}
   ],
 })

src/lib/dl-date-time-picker/public-api.ts

@@ -11,6 +11,7 @@ export * from './dl-date-adapter';
 export * from './dl-date-adapter-moment';
 export * from './dl-date-adapter-native';
 export * from './dl-date-adapter-number';
+export * from './dl-date-adapter-string';
 export * from './dl-date-time-picker-change';
 export * from './dl-date-time-picker-model';
 export * from './dl-date-time-picker.component';