Optionally snap slider to range

[jwahlstrand]

Fixes #40.

Also bump version and require Julia 1.10.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 25.00000% with 18 lines in your changes missing coverage. Please review.

Project coverage is 86.80%. Comparing base (56cd523) to head (13e4c45).
Report is 4 commits behind head on master.

Files with missing lines	Patch %	Lines
src/widgets.jl	25.00%	18 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (56cd523) and HEAD (13e4c45). Click for more details.

HEAD has 2 uploads less than BASE

Flag	BASE (56cd523)	HEAD (13e4c45)
	6	4

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #74      +/-   ##
==========================================
- Coverage   92.49%   86.80%   -5.69%     
==========================================
  Files           6        6              
  Lines        1119     1046      -73     
==========================================
- Hits         1035      908     -127     
- Misses         84      138      +54     

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