fix: Upgrade to ESLint 8 and fix plugin compatibility issues (#34)

* manually bump versions of some plugins to fix breaking changes with ESLint v8

* BREAKING CHANGE: upgrade eslint peer dependency to v8

* Add README note about v2 breaking change

BREAKING CHANGE: This package now requires ESLint 8

Co-authored-by: Seb Aebischer <[email protected]>

README.md

@@ -2,6 +2,8 @@
 
 Shared ESLint configuration for Comic Relief codebases.
 
+**As of version 2.0.0, we require ESLint 8.** Older versions of ESLint have compatibility issues with some plugins and are no longer supported.
+
 ## Usage
 
 1. Install `eslint` if you haven't already done so.

package.json

@@ -7,23 +7,23 @@
   "author": "Comic Relief",
   "license": "MIT",
   "peerDependencies": {
-    "eslint": ">=7.6.0"
+    "eslint": "^8.17.0"
   },
   "devDependencies": {
     "semantic-release": "^17.1.1"
   },
   "dependencies": {
-    "@babel/eslint-parser": ">=7.11.3",
+    "@babel/eslint-parser": "^7.11.3",
     "@typescript-eslint/parser": "^4.7.0",
     "eslint-config-airbnb": "^18.2.1",
     "eslint-config-airbnb-base": "^14.2.1",
-    "eslint-plugin-flowtype": ">=5.2.0",
-    "eslint-plugin-import": ">=2.3.0",
-    "eslint-plugin-jsdoc": "^30.7.7",
-    "eslint-plugin-jsx-a11y": ">=6.2.3",
-    "eslint-plugin-react": ">=7.20.5",
-    "eslint-plugin-sonarjs": ">=0.5.0",
-    "eslint-plugin-unicorn": ">=21.0.0",
+    "eslint-plugin-flowtype": "^8.0.3",
+    "eslint-plugin-import": "^2.3.0",
+    "eslint-plugin-jsdoc": "^39.3.2",
+    "eslint-plugin-jsx-a11y": "^6.5.1",
+    "eslint-plugin-react": "^7.30.0",
+    "eslint-plugin-sonarjs": "^0.13.0",
+    "eslint-plugin-unicorn": "^42.0.0",
     "typescript": "^4.0.5"
   },
   "publishConfig": {