chore(scrapyd-deploy): --list-projects now uses the TARGET positional argument

[jpmckinney]

closes #93

I'm not sure what version level this change belongs to (major/minor/patch). Thoughts?

In light of #96 and #97, maybe better to jump ahead to a 2.0.0 release?

[codecov]

Codecov Report

Merging #95 (e6cd2be) into master (da723bd) will increase coverage by 1.26%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master      #95      +/-   ##
==========================================
+ Coverage   82.30%   83.56%   +1.26%     
==========================================
  Files           5        5              
  Lines         356      353       -3     
==========================================
+ Hits          293      295       +2     
+ Misses         63       58       -5     

Impacted Files	Coverage Δ
scrapyd_client/deploy.py	79.89% <66.66%> (+2.17%)	⬆️

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[jpmckinney]

On second thought, I think an easier upgrade path is to leave scrapyd-deploy as-is (and deprecate it), and to add addversion as a command on scrapyd-client (without --list-projects and --list-targets options).