Ukrainian translation added

Author: gtmizyuk

client/components/Nav.jsx

@@ -657,6 +657,16 @@ class Nav extends React.PureComponent {
                 हिन्दी
               </button>
             </li>
+            <li className="nav__dropdown-item">
+              <button
+                onFocus={this.handleFocusForLang}
+                onBlur={this.handleBlur}
+                value="uk-UA"
+                onClick={(e) => this.handleLangSelection(e)}
+              >
+                Українська
+              </button>
+            </li>
           </ul>
         </li>
       </React.Fragment>

client/i18n.js

@@ -1,17 +1,18 @@
 import i18n from 'i18next';
 import { initReactI18next } from 'react-i18next';
 import Backend from 'i18next-http-backend';
-import { enUS, es, ja, hi } from 'date-fns/locale';
+import { enUS, es, ja, hi, uk } from 'date-fns/locale';
 
 const fallbackLng = ['en-US'];
-const availableLanguages = ['en-US', 'es-419', 'ja', 'hi'];
+const availableLanguages = ['en-US', 'es-419', 'ja', 'hi', 'uk-UA'];
 
 export function languageKeyToLabel(lang) {
   const languageMap = {
     'en-US': 'English',
     'es-419': 'Español',
     ja: '日本語',
-    hi: 'हिन्दी'
+    hi: 'हिन्दी',
+    'uk-UA': 'Українська'
   };
   return languageMap[lang];
 }
@@ -21,7 +22,8 @@ export function languageKeyToDateLocale(lang) {
     'en-US': enUS,
     'es-419': es,
     ja,
-    hi
+    hi,
+    'uk-UA': uk
   };
   return languageMap[lang];
 }