style tag content shouldn't be highlighted\annotated

### Steps to reproduce
1. Go to [this Wikipedia page](https://he.wikipedia.org/wiki/%D7%94%D7%9E%D7%A8%D7%93_%D7%94%D7%92%D7%93%D7%95%D7%9C) (sorry it's Hebrew, but this is where I've encountered the bug).
2. ctrl+f for the words המצב כך:
3. With your mouse, select these words along with the first word of the next paragraph, like so:
)
4. The highlighted text contains the `` tag text:

### Expected behaviour
`<style>` tag content shouldn't be highlighted

### Actual behaviour
`<style>` tag content was highlighted

### Browser/system information
Chrome Version 80.0.3987.163 (Official Build) (64-bit), Windows 10

### Additional details
I'm not sure it's a valid fix, here's what I did on my local build inside `Util.getTextNodes` to fix this:
```
if (node.nodeType !== Util.NodeTypes.COMMENT_NODE &&
node.nodeName.toLowerCase() !== "style") // <-- added by me
```