ComsWasm integration

[leobragaz]

Description

This PR integrate the CosmWasm go module and the possibility to handle custom queries from the contract to the
desmos chain.
Closes #115.

Checklist

• Targeted PR against correct branch.
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Wrote unit tests.
• Wrote integration tests (simulation & CLI).
• Updated the documentation.
• Added an entry to the CHANGELOG.md file.
• Re-reviewed Files changed in the Github PR explorer.

[codecov]

Codecov Report

Merging #351 (b1930d0) into master (16e1eeb) will increase coverage by 6.46%.
The diff coverage is 80.47%.

❗ Current head b1930d0 differs from pull request most recent head 2ab1be1. Consider uploading reports for the commit 2ab1be1 to get more accurate results

@@            Coverage Diff             @@
##           master     #351      +/-   ##
==========================================
+ Coverage   75.59%   82.05%   +6.46%     
==========================================
  Files          94       97       +3     
  Lines        4519     6614    +2095     
==========================================
+ Hits         3416     5427    +2011     
+ Misses        960      899      -61     
- Partials      143      288     +145     

Impacted Files	Coverage Δ
x/commons/commons.go	100.00% <ø> (ø)
x/posts/keeper/params.go	100.00% <ø> (ø)
x/posts/keeper/wasm.go	0.00% <0.00%> (ø)
x/posts/types/codec.go	100.00% <ø> (ø)
x/posts/types/msgs.go	96.80% <ø> (ø)
x/posts/types/params.go	80.95% <ø> (ø)
x/posts/types/polls.go	100.00% <ø> (ø)
x/posts/types/posts.go	91.30% <ø> (ø)
x/posts/types/reactions.go	95.65% <ø> (ø)
x/posts/types/report.go	87.50% <ø> (ø)
... and 145 more

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[leobragaz]

closing this as it's outdated and deprecated in favour of #720