Merge pull request #322 from DEFRA/chore/df-859-eslint9-migration

chore(DF-859): migrate eslint to v9 flat config and fix vulnerabilites

Author: jbarnsley10

.eslintrc.cjs

@@ -1,6 +1,5 @@
 /**
  * Prettier config
- *
  * @type {import('prettier').Config}
  */
 module.exports = {