Drop support for ESLint < v8.44 (#558)

* Chore: update ESLint in devDeps to v8.44.0

* Drop support for ESLint < v8.44

* Create lovely-brooms-explode.md

Author: ota-meshi

.changeset/lovely-brooms-explode.md

@@ -0,0 +1,5 @@
+---
+"eslint-plugin-regexp": major
+---
+
+Drop support for ESLint < v8.44

.github/workflows/NodeCI.yml

@@ -35,32 +35,6 @@ jobs:
               run: npm ci
             - name: Test
               run: npm test
-    test-with-eslint6:
-        runs-on: ubuntu-latest
-        steps:
-            - uses: actions/checkout@v3
-            - uses: actions/setup-node@v3
-              with:
-                  node-version: 18.x
-            - name: Install Target Packages
-              run: |+
-                  npm ci
-                  npm i -D eslint@6 mocha@9 --legacy-peer-deps
-            - name: Test
-              run: npm test
-    test-with-eslint7:
-        runs-on: ubuntu-latest
-        steps:
-            - uses: actions/checkout@v3
-            - uses: actions/setup-node@v3
-              with:
-                  node-version: 18.x
-            - name: Install Target Packages
-              run: |+
-                  npm ci
-                  npm i -D eslint@7 --legacy-peer-deps
-            - name: Test
-              run: npm test
     test-and-coverage:
         runs-on: ubuntu-latest
         steps:

README.md

@@ -40,7 +40,7 @@ npm install --save-dev eslint eslint-plugin-regexp
 
 > **Requirements**
 >
-> - ESLint v6.0.0 and above
+> - ESLint v8.44.0 and above
 > - Node.js v18.x, v20.x and above
 
 <!--DOCS_IGNORE_END-->

docs/user-guide/index.md

@@ -8,7 +8,7 @@ npm install --save-dev eslint eslint-plugin-regexp
 
 ::: tip Requirements
 
-- ESLint v6.0.0 and above
+- ESLint v8.44.0 and above
 - Node.js v18.x, v20.x and above
 
 :::