v16.13.1
Added FB copyright header
Removed 'reactInternal' reference in DevTools overlay highlighter (#17841)
Update Flow to 0.84 (#17805)
fix typos on react-devtools comments (#16681)
Fix Cannot read property 'sub' of undefined when navigating to plain-text pages (#17848)
fix: check bigint in serializeToString and change it to string (#17931)