feat: drop ESLint v2, v3, v4, v5, v6 & v7 support

BREAKING CHANGE: Requires ESLint@^8.57.0 || ^9.0.0

Author: MichaelDeBoey

.github/workflows/native-wsl.yml

@@ -29,7 +29,7 @@ jobs:
     - name: 'WSL: do all npm install steps'
       if: matrix.configuration == 'wsl'
       env:
-        ESLINT_VERSION: 7
+        ESLINT_VERSION: 9
       run: |
         curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/master/install.sh | bash
         export NVM_DIR="$HOME/.nvm"
@@ -52,7 +52,7 @@ jobs:
     - name: copy metafiles in Native
       if: matrix.configuration == 'native'
       env:
-        ESLINT_VERSION: 7
+        ESLINT_VERSION: 9
       run: |
         npm run copy-metafiles
         bash ./tests/dep-time-travel.sh 2>&1

.github/workflows/node.yml

@@ -37,29 +37,9 @@ jobs:
         node-version: ${{ fromJson(needs.matrix.outputs.latest) }}
         eslint:
           - 9
+          - 9.0.0
           - 8
-          - 7
-          - 6
-          - 5
-          - 4
-          - 3
-          - 2
-        include:
-          - node-version: 'lts/*'
-            os: ubuntu-latest
-            eslint: 7
-            env:
-              TS_PARSER: 4
-          - node-version: 'lts/*'
-            os: ubuntu-latest
-            eslint: 7
-            env:
-              TS_PARSER: 3
-          - node-version: 'lts/*'
-            os: ubuntu-latest
-            eslint: 7
-            env:
-              TS_PARSER: 2
+          - 8.57.0
 
     steps:
       - uses: actions/checkout@v4

.github/workflows/packages.yml

@@ -33,8 +33,10 @@ jobs:
       matrix:
         node-version: ${{ fromJson(needs.matrix.outputs.latest) }}
         eslint:
+          - 9
+          - 9.0.0
           - 8
-          - 7
+          - 8.57.0
         package:
           - resolvers/node
           - resolvers/webpack

package.json

@@ -81,7 +81,7 @@
     "chai": "^4.3.10",
     "cross-env": "^4.0.0",
     "escope": "^3.6.0",
-    "eslint": "^2 || ^3 || ^4 || ^5 || ^6 || ^7.2.0 || ^8 || ^9",
+    "eslint": "^8.57.0 || ^9.0.0",
     "eslint-doc-generator": "^1.6.1",
     "eslint-import-resolver-node": "file:./resolvers/node",
     "eslint-import-resolver-typescript": "^1.0.2 || ^1.1.1",
@@ -112,7 +112,7 @@
     "typescript-eslint-parser": "^15 || ^20 || ^22"
   },
   "peerDependencies": {
-    "eslint": "^2 || ^3 || ^4 || ^5 || ^6 || ^7.2.0 || ^8 || ^9"
+    "eslint": "^8.57.0 || ^9.0.0"
   },
   "dependencies": {
     "@rtsao/scc": "^1.1.0",

tests/dep-time-travel.sh

@@ -2,37 +2,12 @@
 
 # expected: ESLINT_VERSION numeric env var
 
-echo "installing ${ESLINT_VERSION} with TS parser ${TS_PARSER:-default}..."
+echo "installing ${ESLINT_VERSION}..."
 
 export NPM_CONFIG_LEGACY_PEER_DEPS=true
 
-if [[ "$ESLINT_VERSION" -lt "7" ]]; then
-  echo "Removing @angular-eslint/template-parser..."
-  npm uninstall --no-save @angular-eslint/template-parser
-fi
-
 npm install --no-save "eslint@${ESLINT_VERSION}" --ignore-scripts
 
-if [[ -n "$TS_PARSER" ]]; then # if TS parser is manually set, always use it
-  echo "Downgrading @typescript-eslint/parser..."
-  npm i --no-save "@typescript-eslint/parser@${TS_PARSER}"
-elif [[ "$ESLINT_VERSION" -lt "5" ]]; then # completely remove the new TypeScript parser for ESLint < v5
-  echo "Removing @typescript-eslint/parser..."
-  npm uninstall --no-save @typescript-eslint/parser
-fi
-
-# use these alternate TypeScript dependencies for ESLint < v4
-if [[ "$ESLINT_VERSION" -lt "4" ]]; then
-  echo "Downgrading babel-eslint..."
-  npm i --no-save babel-eslint@8.0.3
-
-  echo "Downgrading TypeScript dependencies..."
-  npm i --no-save typescript-eslint-parser@15 typescript@2.8.1
-elif [[ "$ESLINT_VERSION" -lt "7" ]]; then
-  echo "Downgrading TypeScript dependencies..."
-  npm i --no-save typescript-eslint-parser@20
-fi
-
 if [ "${ESLINT_VERSION}" = '8' ]; then
   # This is a workaround for the crash in the initial processing of the ESLint class.
   echo "Installing self"