Bump is-svg from 4.2.1 to 4.3.1

Bumps [is-svg](https://github.com/sindresorhus/is-svg) from 4.2.1 to 4.3.1.
- [Release notes](https://github.com/sindresorhus/is-svg/releases)
- [Commits](sindresorhus/is-svg@v4.2.1...v4.3.1)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]