Use "shared" delivery for tests

[JoshKarpel]

This makes it much easier to test locally without a Docker container, if desired.

[codecov[bot]]

Codecov Report

Merging #217 into v0.6.0 will increase coverage by 0%. The diff coverage is n/a.

@@          Coverage Diff          @@
##           v0.6.0   #217   +/-   ##
=====================================
  Coverage      77%    78%           
=====================================
  Files          19     19           
  Lines        1967   1967           
  Branches      315    315           
=====================================
+ Hits         1534   1548   +14     
+ Misses        366    356   -10     
+ Partials       67     63    -4     

Impacted Files	Coverage Δ
htmap/options.py	84% <0%> (+<1%)	:arrow_up:
htmap/maps.py	79% <0%> (+<1%)	:arrow_up:
htmap/errors.py	80% <0%> (+3%)	:arrow_up:
htmap/state.py	97% <0%> (+5%)	:arrow_up: