refactor: update dependencies

src/transformations/timestamp.ts

@@ -12,10 +12,8 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-import * as moment from 'moment';
 import {LogLevel} from '../logger';
 import {Transformation} from '../transformation';
-
 /**
  * Transformation that adds a timestamp to output
  */
@@ -38,6 +36,7 @@ export class Timestamp implements Transformation {
    * @param output Output to add timestamp to
    */
   transform(_logLevel: LogLevel, output: string): string {
+    const moment = require('moment');
     const now = moment();
 
     return `[${now.format(this.format)}] ${output}`;