feat: apply async reactor ostracon

[brew0722]

Description

related Finschia/ostracon#261

closes: #XXXX

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

• Targeted PR against correct branch (see CONTRIBUTING.md)
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code follows the module structure standards.
• Wrote unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer
• Review Codecov Report in the comment section below once CI passes

[codecov]

Codecov Report

Merging #209 (fcfb7ef) into v2/develop (0cb8676) will increase coverage by 0.00%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           v2/develop     #209   +/-   ##
===========================================
  Coverage       53.48%   53.48%           
===========================================
  Files             652      652           
  Lines           47345    47345           
===========================================
+ Hits            25322    25324    +2     
+ Misses          19168    19167    -1     
+ Partials         2855     2854    -1     

Impacted Files	Coverage Δ
x/wasm/internal/keeper/keeper.go	86.90% <0.00%> (+0.37%)	⬆️