Problem: cannot send to cosmos with proxy contract when its a source token

[thomas-nguy]

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Fix logic in the proxy contract
Add integration tests

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Thank you for your code, it's appreciated! :)

[codecov]

Codecov Report

Merging #997 (da31b1b) into main (b262fa8) will decrease coverage by 0.01%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main     #997      +/-   ##
==========================================
- Coverage   44.94%   44.93%   -0.01%     
==========================================
  Files          80       80              
  Lines        6713     6707       -6     
==========================================
- Hits         3017     3014       -3     
+ Misses       3368     3366       -2     
+ Partials      328      327       -1     

Impacted Files	Coverage Δ
x/cronos/keeper/keeper.go	77.01% <50.00%> (+0.97%)	⬆️