Added queue.task_done()

[geekscrapy]

Added so I can wait for tasks to finish before issuing a browser.close_tab(tab)

[codecov]

Codecov Report

Merging #21 into master will increase coverage by 0.03%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #21      +/-   ##
==========================================
+ Coverage   92.85%   92.89%   +0.03%     
==========================================
  Files           4        4              
  Lines         210      211       +1     
  Branches       21       21              
==========================================
+ Hits          195      196       +1     
  Misses          7        7              
  Partials        8        8

Impacted Files	Coverage Δ
pychrome/tab.py	90.78% <100%> (+0.06%)	⬆️

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[fate0]

thanks