fix: Updated svgo dependency to v2.6.0

[rpl]

This PR includes a set of changes to update the svgo dependency to v.2.6.0 along with updating the fork to the tip of the upstream main branch (and keeping the diff between this fork and the upstream version as small and clean as possible).

This is meant to cover and supersede #1

TODO:

• try the new version @rpl/badge package with flow-coverage-reporter to confirm that it does work as expected
• tag a new release and publish it on npm
• open the related flow-coverage-reporter PR to update the dependency (and double-check if that's enough to clear all issues currently reported by npm audit)

[julienw]

hey @rpl, any chance that this could be finished ? :-)

I was thinking that if you'd release this as 2.2.1 or 2.3.0 instead of 3.0.0 like you did, we could update our yarn.lock files directly. But of course that's only if there's no backwards incompatible change :-)

[brettz9]

@rpl : Another bump if you are planning to update?