Bump is-svg from 3.0.0 to 4.3.0

Bumps [is-svg](https://github.com/sindresorhus/is-svg) from 3.0.0 to 4.3.0.
- [Release notes](https://github.com/sindresorhus/is-svg/releases)
- [Commits](https://github.com/sindresorhus/is-svg/compare/v3.0.0...v4.3.0)

---
updated-dependencies:
- dependency-name: is-svg
  dependency-type: direct:production
...

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

package.json

@@ -36,7 +36,7 @@
     "imagemin-optipng": "8.0.0",
     "imagemin-svgo": "9.0.0",
     "is-json": "2.0.1",
-    "is-svg": "3.0.0",
+    "is-svg": "4.3.0",
     "md5": "2.3.0",
     "meow": "5.0.0",
     "parse-color": "1.0.0",