Update dependency flow-bin to ^0.81.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
flow-bin	devDependencies	minor	^0.79.0 -> ^0.81.0	source, changelog

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Release Notes

flowtype/flow-bin

### [`v0.81.0`](https://renovatebot.com/gh/flowtype/flow-bin/compare/v0.80.0...v0.81.0) [Compare Source](https://renovatebot.com/gh/flowtype/flow-bin/compare/v0.80.0...v0.81.0) ### [`v0.80.0`](https://renovatebot.com/gh/flowtype/flow-bin/compare/v0.79.1...v0.80.0) [Compare Source](https://renovatebot.com/gh/flowtype/flow-bin/compare/v0.79.1...v0.80.0)

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[codecov[bot]]

Codecov Report

Merging #138 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #138   +/-   ##
=======================================
  Coverage   96.29%   96.29%           
=======================================
  Files           2        2           
  Lines          27       27           
  Branches        4        4           
=======================================
  Hits           26       26           
  Partials        1        1

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[KevinGrandon]

!merge