add OpenSource Weather App built with Fish Redux

[danieldai]

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Add 'OpenSource Weather App built with Fish Redux' in README

[CLAassistant]

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[codecov-commenter]

Codecov Report

Merging #696 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #696   +/-   ##
=======================================
  Coverage   53.01%   53.01%           
=======================================
  Files          54       54           
  Lines        1358     1358           
=======================================
  Hits          720      720           
  Misses        638      638           

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