BUG: column names with degree sign make query fail
This pull request adds DEGREESIGN (°) to tokens that are parsed and escaped in a backticked column. There are no separate issue reporting this, but this is similar to the EUROSIGN issue previously addressed.

- [ ] closes #xxxx
- [x] tests added / passed
- [ ] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing.html#code-standards) for how to run them
- [x] whatsnew entry

Thanks for the pr @fdion! Would you mind adding a test that fails on master, but works with this addition? And could use a whatsnew note about this change. Since there were no tests for the column names in query, I added a test @mzeitlin11 that covers something that worked on main (`Capacitance(μF)`) with a special character, and with the degree symbol (`Temp(°C)`) which will fail on main. All 4 tests pass with my change. > Since there were no tests for the column names in query, I added a test @mzeitlin11 that covers something that worked on main (`Capacitance(μF)`) with a special character, and with the degree symbol (`Temp(°C)`) which will fail on main. All 4 tests pass with my change.

Thanks, tests look great! 2 small comments, otherwise LGTM thanks @fdion 