Migrate to @svengreb/remark-preset-lint npm package (#91)

Before the `@arcticicestudio/remark-preset-lint` package [2] was used
which has been deprecated during the `svengreb` GitHub account and
`@svengreb` npm package scope migration [2] and replaced by the new
`@svengreb/remark-preset-lint` package [2].

[1]: https://github.com/arcticicestudio/styleguide-markdown/tree/main/packages/@arcticicestudio/remark-preset-lint
[2]: svengreb/styleguide-markdown#63
[3]: https://github.com/svengreb/styleguide-markdown/tree/main/packages/%40svengreb/remark-preset-lint

GH-90

Author: svengreb

.eslintignore

@@ -11,4 +11,4 @@ node_modules/
 # ESLint automatically applies ignore pattern for "dotfiles" by default to prevent accidentally lint over paths like
 # `.git` or any other critical paths.
 !**/.eslintrc.js
-!.remarkrc.js
+!.remarkrc.mjs

.remarkrc.js renamed to .remarkrc.mjs

@@ -8,6 +8,6 @@
  * @see https://github.com/remarkjs/remark-lint
  * @see https://remark.js.org
  */
-module.exports = {
-  plugins: ["@arcticicestudio/remark-preset-lint"],
+export default {
+  plugins: ["@svengreb/remark-preset-lint"],
 };