Prep for v5

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Codecov Report

Merging #38 (c5465b5) into master (2aab9e5) will decrease coverage by 2.04%. Report is 7 commits behind head on master. The diff coverage is 88.88%.

@@            Coverage Diff             @@
##           master      #38      +/-   ##
==========================================
- Coverage   99.28%   97.25%   -2.04%     
==========================================
  Files           7        7              
  Lines         560      655      +95     
==========================================
+ Hits          556      637      +81     
- Misses          4       18      +14     

Flag	Coverage Δ
unittests	97.25% <88.88%> (-2.04%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
ktplotspy/plot/plot_cpdb.py	94.04% <88.13%> (-5.96%)	:arrow_down:
ktplotspy/plot/plot_cpdb_heatmap.py	92.00% <100.00%> (+0.33%)	:arrow_up:
ktplotspy/utils/settings.py	100.00% <100.00%> (ø)

[zktuong]

looking good at the moment!

• [x] add the functionality for cellsign
• [x] bump to major version