Update Node packages

Updated all outdated Node packages to their latest versions:

- lint-staged [1] - Bumped minimum version from `v10.5.4` to
  `v11.0.0` [2].
- prettier [3] - Bumped minimum version from `v2.2.1` to
  `v2.3.2` [4]. It comes with the nice improvement to treat the
  `.prettierrc` file as YAML when formatting it [5].
- Validated all files after running formatting and linting tools with
  their latest versions.

[1]: https://github.com/okonet/lint-staged
[2]: typicode/husky@v10.5.4...v11.0.0
[3]: https://github.com/prettier/prettier
[4]: prettier/prettier@v2.2.1...v2.3.2
[5]: https://prettier.io/blog/2021/05/09/2.3.0.html#treat-prettierrc-as-yaml-when-formatting-it-8105httpsgithubcomprettierprettierpull8105-by-fiskerhttpsgithubcomfisker

GH-78

package.json

@@ -29,9 +29,9 @@
   "devDependencies": {
     "@arcticicestudio/remark-preset-lint": ">=0.4.0 <1.0.0",
     "husky": "^6.0.0",
-    "lint-staged": "^10.5.4",
+    "lint-staged": "^11.0.0",
     "npm-run-all": "^4.1.5",
-    "prettier": "^2.2.1",
+    "prettier": "^2.3.2",
     "remark-cli": "^9.0.0"
   }
 }