add el_GR locale (Greek) (#6928)

Update index.test.js

Syntactic error corrected

components/calendar/locale/el_GR.tsx

@@ -0,0 +1,2 @@
+import el_GR from '../../date-picker/locale/el_GR';
+export default el_GR;

components/date-picker/locale/el_GR.tsx

@@ -0,0 +1,19 @@
+import CalendarLocale from 'rc-calendar/lib/locale/el_GR';
+import TimePickerLocale from '../../time-picker/locale/el_GR';
+
+// Merge into a locale object
+const locale = {
+  lang: {
+    placeholder: 'Επιλέξτε ημερομηνία',
+    rangePlaceholder: ['Αρχική ημερομηνία', 'Τελική ημερομηνία'],
+    ...CalendarLocale,
+  },
+  timePickerLocale: {
+    ...TimePickerLocale,
+  },
+};
+
+// All settings at:
+// https://github.com/ant-design/ant-design/issues/424
+
+export default locale;

components/locale-provider/__tests__/index.test.js

@@ -29,8 +29,9 @@ import bgBG from '../bg_BG';
 import viVN from '../vi_VN';
 import thTH from '../th_TH';
 import faIR from '../fa_IR';
+import elGR from '../el_GR';
 
-const locales = [enUS, ptBR, ruRU, esES, svSE, frBE, deDE, nlNL, caES, csCZ, koKR, etEE, skSK, jaJP, trTR, zhTW, fiFI, plPL, bgBG, enGB, frFR, nlBE, itIT, viVN, thTH, faIR];
+const locales = [enUS, ptBR, ruRU, esES, svSE, frBE, deDE, nlNL, caES, csCZ, koKR, etEE, skSK, jaJP, trTR, zhTW, fiFI, plPL, bgBG, enGB, frFR, nlBE, itIT, viVN, thTH, faIR, elGR];
 
 const Option = Select.Option;
 const RangePicker = DatePicker.RangePicker;

components/locale-provider/el_GR.tsx

@@ -0,0 +1,47 @@
+import moment from 'moment';
+moment.locale('el');
+
+import Pagination from 'rc-pagination/lib/locale/el_GR';
+import DatePicker from '../date-picker/locale/el_GR';
+import TimePicker from '../time-picker/locale/el_GR';
+import Calendar from '../calendar/locale/el_GR';
+
+export default {
+  locale: 'el',
+  Pagination,
+  DatePicker,
+  TimePicker,
+  Calendar,
+  Table: {
+    filterTitle: 'Μενού φίλτρων',
+    filterConfirm: 'ΟΚ',
+    filterReset: 'Επαναφορά',
+    emptyText: 'Δεν υπάρχουν δεδομένα',
+    selectAll: 'Επιλογή τρέχουσας σελίδας',
+    selectInvert: 'Αντιστροφή τρέχουσας σελίδας',
+  },
+  Modal: {
+    okText: 'ΟΚ',
+    cancelText: 'Άκυρο',
+    justOkText: 'ΟΚ',
+  },
+  Popconfirm: {
+    okText: 'ΟΚ',
+    cancelText: 'Άκυρο',
+  },
+  Transfer: {
+    notFoundContent: 'Δεν βρέθηκε',
+    searchPlaceholder: 'Αναζήτηση',
+    itemUnit: 'αντικείμενο',
+    itemsUnit: 'αντικείμενα',
+  },
+  Select: {
+    notFoundContent: 'Δεν βρέθηκε',
+  },
+  Upload: {
+    uploading: 'Μεταφόρτωση...',
+    removeFile: 'Αφαίρεση αρχείου',
+    uploadError: 'Σφάλμα μεταφόρτωσης',
+    previewFile: 'Προεπισκόπηση αρχείου',
+  },
+};

components/time-picker/locale/el_GR.tsx

@@ -0,0 +1,5 @@
+const locale = {
+  placeholder: 'Επιλέξτε ώρα',
+};
+
+export default locale;