feat(subscribe): add unsubscribe api,add actions return value from Model

[ArrayZoneYour]

Subscriptions: Function => Function[]

[codecov]

Codecov Report

Merging #82 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #82   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           4      4           
  Lines         191    206   +15     
  Branches       26     29    +3     
=====================================
+ Hits          191    206   +15

Impacted Files	Coverage Δ
src/middlewares.ts	100% <100%> (ø)	⬆️
src/index.tsx	100% <100%> (ø)	⬆️

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