FileReader.readAsBinaryString is not being reported as unsupported in IE

Hello 👋 ,

`FileReader.readAsBinaryString` method is not supported under Internet Explorer and it should be reported.

**Plugin version**: eslint-plugin-compat@3.8.0
**Settings**:
```json
{
"settings": {
"polyfills": [
"Array.from",
"fetch",
"Object.assign",
"Object.entries",
"Promise",
"Symbol",
"URL"
]
}
}

```
**Reference**:
- https://caniuse.com/#feat=filereader
- https://developer.mozilla.org/en-US/docs/Web/API/FileReader#Browser_compatibility