chore: update deprecated yargs usage

Author: wKovacs64

src/commands/pw.ts

@@ -25,7 +25,7 @@ export function builder(yargs: Argv<PwArgvOptions>): Argv<PwHandlerOptions> {
     .positional('password', {
       type: 'string',
     })
-    .demand('password')
+    .demandOption('password')
     .check((argv) => {
       if (!argv.password.length) {
         throw new Error('The password argument must not be empty.');

src/commands/search.ts

@@ -35,7 +35,7 @@ export function builder(
       alias: 'email',
       type: 'string',
     })
-    .demand('account')
+    .demandOption('account')
     .check((argv) => {
       if (!argv.account.length) {
         throw new Error('The account argument must not be empty.');