Bump snake-case from 3.0.4 to 4.0.0

Bumps [snake-case](https://github.com/blakeembrey/change-case) from 3.0.4 to 4.0.0.
- [Release notes](https://github.com/blakeembrey/change-case/releases)
- [Commits](https://github.com/blakeembrey/change-case/compare/[email protected]@4.0.0)

---
updated-dependencies:
- dependency-name: snake-case
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -24,7 +24,7 @@
     "concat-stream": "^2.0.0",
     "deep-equal": "^2.0.5",
     "hallmark": "^4.1.0",
-    "snake-case": "^3.0.4",
+    "snake-case": "^4.0.0",
     "standard": "^16.0.4",
     "tape": "^5.5.0",
     "through2": "^4.0.2"