breaking: change the provider push and pull I/F

[kazupon]

No description provided.

[codecov-io]

Codecov Report

Merging #40 into master will increase coverage by 0.04%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #40      +/-   ##
==========================================
+ Coverage   90.58%   90.63%   +0.04%     
==========================================
  Files           7        7              
  Lines         425      427       +2     
  Branches       56       56              
==========================================
+ Hits          385      387       +2     
  Misses         18       18              
  Partials       22       22

Impacted Files	Coverage Δ
src/commands/pull.ts	84.78% <100%> (+0.33%)	⬆️
src/commands/push.ts	90.32% <100%> (+0.15%)	⬆️

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