[Feature] WASM integration

[yun-yeo]

NOTE:: THIS MUST BE MERGED AFTER #323

Summary of changes

This PR should be merged after #323

WASM integration

wait until cosmwasm v0.8 release

TODO

• Itegrate cosmwasm v0.8.x
• Combine Config
• Bank Querier & Handler
• Staking Querier & Handler
• Custom Handler & Querier for market module
• Custom Querier for oracle module

Report of required housekeeping

• Github issue OR spec proposal link
• Wrote tests
• Updated relevant documentation (docs/)
• Added a relevant changelog entry: clog add [section] [stanza] [message]

---

(FOR ADMIN) Before merging

• Added appropriate labels to PR
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)
• Confirm added tests are consistent with the intended behavior of changes
• Ensure all tests pass

[codecov]

Codecov Report

Merging #335 into develop will decrease coverage by 3.39%.
The diff coverage is 56.24%.

@@             Coverage Diff             @@
##           develop     #335      +/-   ##
===========================================
- Coverage    68.46%   65.06%   -3.40%     
===========================================
  Files           72      101      +29     
  Lines         3618     5110    +1492     
===========================================
+ Hits          2477     3325     +848     
- Misses        1004     1581     +577     
- Partials       137      204      +67     

Impacted Files	Coverage Δ
x/market/internal/types/querier.go	0.00% <ø> (ø)
x/treasury/internal/types/querier.go	0.00% <ø> (ø)
x/wasm/internal/types/connector.go	0.00% <0.00%> (ø)
x/wasm/internal/types/contract.go	0.00% <0.00%> (ø)
x/wasm/internal/types/keys.go	0.00% <0.00%> (ø)
x/wasm/internal/types/msg_binding.go	0.00% <0.00%> (ø)
x/wasm/internal/types/querier.go	0.00% <0.00%> (ø)
x/wasm/internal/types/query_binding.go	0.00% <0.00%> (ø)
x/wasm/module.go	12.06% <12.06%> (ø)
x/wasm/internal/keeper/querier.go	25.00% <25.00%> (ø)
... and 53 more

[yun-yeo]

In current design, wasm module can invoke bank/MsgSend without tax. We need a way to deduct tax from wasm send.

[yun-yeo]

Deduct tax on instantiate & execute msg seems enough.