TextEditor.get is deprecated.

`TextEditor.prototype.displayBuffer` has always been private, but now
it is gone. Reading the `displayBuffer` property now returns a reference
to the containing `TextEditor`, which now provides *some* of the API of
the defunct `DisplayBuffer` class.
```
TextEditor.get (/usr/share/atom/resources/app.asar/src/text-editor.js:101:14)
atom-color-highlight.updateSelections (/home/nico/.atom/packages/atom-color-highlight/lib/atom-color-highlight-element.coffee:150:22)
atom-color-highlight.setModel (/home/nico/.atom/packages/atom-color-highlight/lib/atom-color-highlight-element.coffee:129:19)
createView (/home/nico/.atom/packages/atom-color-highlight/lib/atom-color-highlight-element.coffee:339:15)
ViewRegistry.createView (/usr/share/atom/resources/app.asar/src/view-registry.js:117:78)
ViewRegistry.getView (/usr/share/atom/resources/app.asar/src/view-registry.js:84:21)
```

The issue mentions a deprecation in TextEditor.get and a reference to atom-color-highlight-element.coffee line 150. Start by examining that file to see how TextEditor.get is used. Check the Atom API documentation for the new method to replace the deprecated one. Run the package's tests to ensure the fix works.

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