Triggering the stake limit increase event

[mohitmamoria]

• Linked to Github issues that this PR fixes (if any)
• Wrote tests
• Updated README.md if needed
• Updated docs/spec if needed
• Tested running truchain, truapi, and truapp locally (https://gist.github.com/shanev/3897a80072ac4147677fa596ada497fb)

Needed for TruStory/octopus#381.

[jhernandezb]

This looks good to me but since this is a sensitive part of the chain I'd suggest adding proper testing

[codecov]

Codecov Report

Merging #805 into develop will increase coverage by 0.05%.
The diff coverage is 63.82%.

@@             Coverage Diff             @@
##           develop     #805      +/-   ##
===========================================
+ Coverage    58.68%   58.73%   +0.05%     
===========================================
  Files           73       73              
  Lines         4175     4222      +47     
===========================================
+ Hits          2450     2480      +30     
- Misses        1515     1531      +16     
- Partials       210      211       +1

[mohitmamoria]

@shanev @jhernandezb Possible to get this in sometime this week?

[shanev]

Have some questions.

[shanev]

So this isn't hidden: #805 (comment)

[shanev]

Is this still an issue? Was never merged in for some reason.

[mohitmamoria]

I think all issues were resolved but somehow was never merged in.

[shanev]

Will have to update for utru anyway, so let's get this in after the utru migration.

[shanev]

@mohitmamoria Can merge this after it's migrated to utru and the branch has been updated.