Bump is-svg from 4.2.1 to 4.3.2 in /src

Bumps [is-svg](https://github.com/sindresorhus/is-svg) from 4.2.1 to 4.3.2.
- [Release notes](https://github.com/sindresorhus/is-svg/releases)
- [Commits](sindresorhus/is-svg@v4.2.1...v4.3.2)

---
updated-dependencies:
- dependency-name: is-svg
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>