Does not support in IE11 ?

**What version of Ajv are you using? Does the issue happen if you use the latest version?**
"ajv": "^8.6.3".
the latest version has the same issue.
**Ajv options object**
null

```javascript

```

**JSON Schema**
null

```json

```

**Sample data**
null

```json

```

**Your code**
```js
import Ajv from "ajv";
```

```javascript

```

**Validation result, data AFTER validation, error messages**
I just import ajv in vue-cli,it work in chrome, but it report error in IE11.

```

```

**What results did you expect?**

**Are you going to resolve the issue?**
Not sure how to do.