chore(deps-dev): bump buffer from 5.7.1 to 6.0.3

Bumps [buffer](https://github.com/feross/buffer) from 5.7.1 to 6.0.3.
- [Release notes](https://github.com/feross/buffer/releases)
- [Commits](feross/buffer@v5.7.1...v6.0.3)

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

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

package.json

@@ -39,7 +39,7 @@
     "babel-loader": "8.2.5",
     "benchmark": "2.1.4",
     "bluebird": "3.7.2",
-    "buffer": "^5.6.0",
+    "buffer": "^6.0.3",
     "cheerio": "1.0.0-rc.12",
     "crypto-browserify": "3.12.0",
     "dox": "0.3.1",