Fix CI tests related to .kill(0) (#1212)

Author: ehmicky

test/return/result.js

@@ -111,16 +111,13 @@ test('result.isTerminated is false if not killed', async t => {
 	t.false(isTerminated);
 });
 
-// Remove the condition after fixing the bug at https://github.com/sindresorhus/execa/issues/1193
-if (!isWindows) {
-	test('result.isTerminated is false if not killed and subprocess.kill() was called', async t => {
-		const subprocess = execa('noop.js');
-		subprocess.kill(0);
-		t.true(subprocess.killed);
-		const {isTerminated} = await subprocess;
-		t.false(isTerminated);
-	});
-}
+test('result.isTerminated is false if not killed and subprocess.kill() was called', async t => {
+	const subprocess = execa('noop.js');
+	subprocess.kill(0);
+	t.true(subprocess.killed);
+	const {isTerminated} = await subprocess;
+	t.false(isTerminated);
+});
 
 test('result.isTerminated is false if not killed, in sync mode', t => {
 	const {isTerminated} = execaSync('noop.js');