:alien: Change `size` to `radius` for `bokeh 3.4` Compatibility

[measty]

Bokeh 3.4 depreciated size in favor of radius in circle glyphs (you used to be able to use either, now only radius exists) and so tests now fail since 3.4.

This PR replaces all references to 'size' in circle glyphs with corresponding 'radius' for compatibility with bokeh 3.4.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.89%. Comparing base (ce348e7) to head (b919b6e). Report is 1 commits behind head on develop.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #796 +/- ## ======================================== Coverage 99.89% 99.89% ======================================== Files 69 69 Lines 8534 8534 Branches 1641 1641 ======================================== Hits 8525 8525 Misses 1 1 Partials 8 8 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.