feat(claim): genesis and types

[aljo242]

Closes #783

What does this PR does?

• add genesis of claim module
• create ClaimRecord and Mission types
• add Validate methods and tests
• minor lint and fix

[codecov]

Codecov Report

Merging #800 (8b50d54) into develop (9e38ac7) will decrease coverage by 0.01%.
The diff coverage is 10.20%.

@@             Coverage Diff             @@
##           develop     #800      +/-   ##
===========================================
- Coverage    10.56%   10.54%   -0.02%     
===========================================
  Files          315      328      +13     
  Lines        73466    76534    +3068     
===========================================
+ Hits          7760     8073     +313     
- Misses       65519    68256    +2737     
- Partials       187      205      +18     

Impacted Files	Coverage Δ
x/claim/types/genesis.pb.go	0.79% <0.00%> (-0.55%)	⬇️
x/claim/types/query.pb.gw.go	0.00% <0.00%> (ø)
x/claim/types/query.pb.go	0.72% <0.82%> (-0.44%)	⬇️
x/claim/types/claim_record.pb.go	0.83% <0.83%> (ø)
x/claim/types/mission.pb.go	1.01% <1.01%> (ø)
x/claim/types/genesis.go	67.39% <61.53%> (-32.61%)	⬇️
x/claim/keeper/grpc_query_airdrop_supply.go	72.72% <72.72%> (ø)
x/claim/keeper/airdrop_supply.go	76.92% <76.92%> (ø)
x/claim/genesis.go	84.61% <77.77%> (-15.39%)	⬇️
x/claim/keeper/grpc_query_mission.go	80.64% <80.64%> (ø)
... and 13 more

[lumtis]

Good progress on the module

We need to add Validate method for ClaimRecord and Mission

[lumtis]

👍
Some comments on the test file

[giunatale]

I've marked the tc := tc as per #806 so we can remove them from the UI. I agree with your comments @lubtd

rest looks good!