Allow setting None to lim

[hanjinliu]

This PR add the support of canvas.x.lim = None, 2

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.33%. Comparing base (c24a0eb) to head (6f2fe15).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #59   +/-   ##
=======================================
  Coverage   83.32%   83.33%           
=======================================
  Files         196      196           
  Lines       21195    21206   +11     
  Branches     3440     3441    +1     
=======================================
+ Hits        17660    17671   +11     
  Misses       2608     2608           
  Partials      927      927           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.