Maintenance: upgrade lint-staged from 6.1.1 to 7.0.0

[Hypnosphi]

Fixes #3049

We call npm scripts explicitly (via yarn), so the breaking change shouldn't concern us

[codecov]

Codecov Report

Merging #3067 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3067   +/-   ##
=======================================
  Coverage   36.08%   36.08%           
=======================================
  Files         438      438           
  Lines        9447     9447           
  Branches      880      891   +11     
=======================================
  Hits         3409     3409           
+ Misses       5476     5456   -20     
- Partials      562      582   +20

Impacted Files	Coverage Δ
app/react/src/server/utils.js	0% <0%> (-100%)	⬇️
addons/viewport/src/components/RotateViewport.js	22.72% <0%> (ø)	⬆️
...es__/update-addon-info/update-addon-info.output.js	0% <0%> (ø)	⬆️
lib/ui/src/modules/shortcuts/actions/shortcuts.js	22.41% <0%> (ø)	⬆️
addons/info/src/components/markdown/pre/pre.js	77.58% <0%> (ø)	⬆️
lib/core/src/client/manager/index.js	0% <0%> (ø)	⬆️
app/react-native/src/bin/storybook-start.js	0% <0%> (ø)	⬆️
addons/a11y/src/components/Report/Elements.js	0% <0%> (ø)	⬆️
lib/ui/src/modules/ui/containers/routed_link.js	22.72% <0%> (ø)	⬆️
addons/actions/src/lib/types/symbol/index.js	81.25% <0%> (ø)	⬆️
... and 59 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3e8462b...882a8fb. Read the comment docs.