Bump svgr/webpack to 6.x

Created by: palminha

Is your proposal related to a problem?

svgr/webpack 5.5.0 is using some "old" dependencies that are causing some npm audit and dependabot warnings (see https://github.com/facebook/create-react-app/issues/12132)

Describe the solution you'd like

Bump svgr/webpack to latest version: 6.x

Additional context

SVGR v6 uses SVGO v2 under the hood and includes tons of improvement. Might need some migration work: SVGR migration guide.