New traceback formatting with stack_data

[aroberge]

See friendly-traceback/friendly-traceback#152

Note: some statements like

raise LookupError("Fake message")

used to be entirely highlighted. However, after working on issue 152 mentioned above, with the latest version using stack_data, they are no longer highlighted. This is ok for friendly_traceback, but with the coloured highlighting provided by friendly, it makes sense to highlight them.

Tasks:

• Upload a new version to Pypi that uses a specific version of friendly_traceback
  After friendly_traceback has been updated
• Make friendly compatible with this newest version
• Upload a new version to Pypi
• Improve highlighting when triple-quote text is present
• Make sure that single line statement, such as raise LookupError("Fake message") mentioned above, would still be highlighted. The key here is to look for a line indicator, -->, with no corresponding ^ markers. Edit With the new hihglighting of the line number itself, it does not seem necessary to highlight the entire text; in fact, it would be less attractive to do so.
• Use Rich's addition for "partial highlights" (need a reference here) to replace my current custom code for background highlighting. My revised version likely works better as the contrast is guaranteed.
• Check with IPython
• Check with Jupyter
• Check with IDLE
• Upload new version to Pypi.

[aroberge]

The formatting is still not quite right in some cases:

[aroberge]