fix(deps): bump react/react-dom to ^16.14.0 to resolve peer conflicts

react@16.6.3 failed react-select@^3.2.0's peer requirement
(react >=16.8), causing npm ci to fail with ERESOLVE under npm 7+.
Bump to ^16.14.0, the highest react 16 release, which satisfies all
peers (react-select, semantic-ui-react, react-virtualized). react 17
is not viable here because react-virtualized@9.22.2 caps react at 16.
Regenerated lockfile resolves cleanly without legacy-peer-deps.

Author: Kav91