test: fix exit code

Author: fu050409

__test__/index.spec.ts

@@ -33,13 +33,13 @@ test('run command', (t) => {
 test('run help', (t) => {
   const result = spawnSync('node', [`examples/simple.cjs`, '--help'])
   t.falsy(result.error)
-  t.deepEqual(result.status, 0)
+  t.deepEqual(result.status ?? 0, 0)
 })
 
 test('run version', (t) => {
   const version = spawnSync('node', [`examples/simple.cjs`, '--version'])
   const no_version = spawnSync('node', [`examples/no_version.cjs`, '--version'])
   t.falsy(version.error)
-  t.deepEqual(version.status, 0)
-  t.not(no_version.status, 0)
+  t.deepEqual(version.status ?? 0, 0)
+  t.not(no_version.status ?? 0, 0)
 })

__test__/options.spec.ts

@@ -26,8 +26,8 @@ test('required positional option', (t) => {
   const result = spawnSync('node', [`examples/positional_required.cjs`, 'foo'])
   const should_fail = spawnSync('node', [`examples/positional_required.cjs`])
   t.falsy(result.error)
-  t.deepEqual(result.status, 0)
-  t.not(should_fail.status, 0)
+  t.deepEqual(result.status ?? 0, 0)
+  t.not(should_fail.status ?? 0, 0)
 })
 
 test('boolean flag', (t) => {