feat: drop ESLint v6 & v7 support (#203)

BREAKING CHANGE: Requires ESLint@^8.57.0

Author: MichaelDeBoey

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
         strategy:
             fail-fast: false
             matrix:
-                eslint: [6, 7, 8]
+                eslint: [8.57.0, 8]
         runs-on: ubuntu-latest
         steps:
             - name: ⬇️ Checkout repo
@@ -62,14 +62,11 @@ jobs:
                       eslint: 8
                       node: 18
                     # On old ESLint versions
-                    - eslint: 7
-                      node: 18
-                      os: ubuntu-latest
-                    - eslint: 6
+                    - eslint: 8.57.0
                       node: 18
                       os: ubuntu-latest
                     # On the minimum supported ESLint/Node.js version
-                    - eslint: 6.6.0
+                    - eslint: 8.57.0
                       node: 18.18.0
                       os: ubuntu-latest
         runs-on: ${{ matrix.os }}

README.md

@@ -17,7 +17,7 @@ npm install --save-dev eslint @eslint-community/eslint-plugin-mysticatea
 ### Requirements
 
 -   Node.js `^18.18.0 || ^20.9.0 || >=21.1.0`
--   ESLint `^6.6.0 || ^7.0.0 || ^8.0.0` or newer versions.
+-   ESLint `^8.57.0`
 
 ## 📖 Usage
 

package.json

@@ -67,7 +67,7 @@
         "typescript": "~5.0.4"
     },
     "peerDependencies": {
-        "eslint": "^6.6.0 || ^7.0.0 || ^8.0.0"
+        "eslint": "^8.57.0"
     },
     "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"