[Cashtab] [p3 upgrading deps] upgrading @svgr/webpack

Summary:
T2678

Depends on D12008

Upgrade to latest version of @svgr/webpack

Test Plan:
npm start and app works
npm run build and no errors

Reviewers: #bitcoin_abc, emack

Reviewed By: #bitcoin_abc, emack

Differential Revision: https://reviews.bitcoinabc.org/D12009