[BUG] bounds for client assignment variables

[jGaboardi]

This PR resolves #328. Following merge we can cut release v0.5.0 🎉

xref #331

[codecov]

Codecov Report

Merging #336 (54208a6) into main (13c0ddc) will not change coverage.
The diff coverage is 100.0%.

@@          Coverage Diff          @@
##            main    #336   +/-   ##
=====================================
  Coverage   74.0%   74.0%           
=====================================
  Files         23      23           
  Lines       2477    2477           
  Branches     513     513           
=====================================
  Hits        1833    1833           
  Misses       580     580           
  Partials      64      64           

Impacted Files	Coverage Δ
spopt/locate/base.py	93.6% <100.0%> (ø)
spopt/locate/coverage.py	95.6% <100.0%> (ø)
spopt/locate/p_center.py	100.0% <100.0%> (ø)
spopt/locate/p_median.py	100.0% <100.0%> (ø)

[gegen07]

Nice catch!