flow-typed: Define minimist
flow-typed: Define minimist

Summary: Fixes a minor Flow type error when `minimist` is typed via `flow-typed`.

Reviewed By: TheSavior

Differential Revision: D13188680

fbshipit-source-id: 9ad35a3222c8937163a998a2751efd95945af3c7

javache/react-native,janicduplessis/react-native,janicduplessis/react-native,pandiaraj44/react-native,janicduplessis/react-native,exponent/react-native,exponentjs/react-native,javache/react-native,facebook/react-native,hoangpham95/react-native,exponentjs/react-native,javache/react-native,janicduplessis/react-native,janicduplessis/react-native,pandiaraj44/react-native,hoangpham95/react-native,hoangpham95/react-native,janicduplessis/react-native,hammerandchisel/react-native,myntra/react-native,arthuralee/react-native,exponent/react-native,pandiaraj44/react-native,facebook/react-native,exponentjs/react-native,hammerandchisel/react-native,javache/react-native,hammerandchisel/react-native,myntra/react-native,facebook/react-native,facebook/react-native,pandiaraj44/react-native,hammerandchisel/react-native,exponentjs/react-native,facebook/react-native,exponent/react-native,javache/react-native,arthuralee/react-native,javache/react-native,hoangpham95/react-native,pandiaraj44/react-native,hoangpham95/react-native,arthuralee/react-native,facebook/react-native,hoangpham95/react-native,pandiaraj44/react-native,exponentjs/react-native,hammerandchisel/react-native,javache/react-native,myntra/react-native,facebook/react-native,myntra/react-native,myntra/react-native,hoangpham95/react-native,hammerandchisel/react-native,hammerandchisel/react-native,myntra/react-native,janicduplessis/react-native,arthuralee/react-native,pandiaraj44/react-native,exponentjs/react-native,exponent/react-native,facebook/react-native,pandiaraj44/react-native,exponent/react-native,myntra/react-native,exponent/react-native,exponentjs/react-native,myntra/react-native,javache/react-native,facebook/react-native,myntra/react-native,hoangpham95/react-native,hammerandchisel/react-native,janicduplessis/react-native,exponent/react-native,exponent/react-native,arthuralee/react-native,exponentjs/react-native,javache/react-native