refactor: update dependencies

src/common.ts

@@ -30,7 +30,7 @@ export type RecursivePartial<T> = {
  *
  * @param obj Object to delete undefined properties from
  */
-export function deleteUndefinedProperties(obj: unknown) {
+export function deleteUndefinedProperties(obj: unknown): unknown {
   // return atomic data types and arrays (recursion anchor)
   if (typeof obj !== 'object' || Array.isArray(obj)) {
     return obj;

src/smtp.ts

@@ -205,7 +205,7 @@ export class SMTP extends VerifiableTransport {
     const config = {
       ...smtpConfig,
       // deleting undefined properties so the actual config doesn't get overwritten by undefined values
-      ...deleteUndefinedProperties(envConfig),
+      ...(deleteUndefinedProperties(envConfig) as object),
     } as SMTPConfig;
 
     if (typeof config.host === 'undefined') {

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}`;