Flow: upgrade to 0.142

[kassens]

Just a small update, as the next version makes types_first the only available option, which still requires some more migration of files and we might be stuck here for a moment.

[sizebot]

Comparing: 5fdcd23...3711f38

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.min.js	=	134.98 kB	134.98 kB	=	43.24 kB	43.24 kB
oss-experimental/react-dom/cjs/react-dom.production.min.js	=	141.70 kB	141.70 kB	=	45.23 kB	45.23 kB
facebook-www/ReactDOM-prod.classic.js	=	486.34 kB	486.34 kB	=	86.56 kB	86.56 kB
facebook-www/ReactDOM-prod.modern.js	=	471.64 kB	471.64 kB	=	84.33 kB	84.33 kB
facebook-www/ReactDOMForked-prod.classic.js	=	486.34 kB	486.34 kB	=	86.56 kB	86.56 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

Generated by 🚫 dangerJS against 3711f38