Add Tendermint events for staking module

[freak12techno]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 10.60606% with 118 lines in your changes are missing coverage. Please review.

Project coverage is 58.79%. Comparing base (89779ba) to head (03deecf).
Report is 11 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #256      +/-   ##
===========================================
+ Coverage    58.72%   58.79%   +0.06%     
===========================================
  Files           84       84              
  Lines        15784    15553     -231     
===========================================
- Hits          9269     9144     -125     
+ Misses        6515     6409     -106     

Files	Coverage Δ
src/coins/staking/tests.rs	98.02% <100.00%> (+0.16%)	⬆️
src/plugins/signer.rs	59.64% <92.85%> (+3.56%)	⬆️
src/coins/staking/mod.rs	51.95% <0.00%> (-10.00%)	⬇️

... and 62 files with indirect coverage changes