feat: Support ESLint 7.x

Author: MichaelDeBoey

.github/workflows/CI.yml

@@ -13,13 +13,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v1
-      with:
-        fetch-depth: 1
+      uses: actions/checkout@v2
     - name: Install Node.js
       uses: actions/setup-node@v1
       with:
-        node-version: 12
+        node-version: 14
     - name: Install Packages
       run: npm install
     - name: Lint
@@ -29,35 +27,50 @@ jobs:
     name: Test
     strategy:
       matrix:
-        node: [12, 10, 8, 6]
-        eslint: [6, 5]
-        exclude:
-        # ESLint 6 doesn't support Node 6.
-        - node: 6
-          eslint: 6
-        # Run ESLint 5 on only the newest and oldest Node.
-        - node: 10
-          eslint: 5
-        - node: 8
-          eslint: 5
-    runs-on: ubuntu-latest
+        os: [ubuntu-latest]
+        eslint: [7]
+        node: [14]
+        include:
+          # On other platforms
+          - eslint: 7
+            node: 14
+            os: windows-latest
+          - eslint: 7
+            node: 14
+            os: macos-latest
+          # On old Node.js versions
+          - eslint: 7
+            node: 12
+            os: ubuntu-latest
+          - eslint: 7
+            node: 10
+            os: ubuntu-latest
+          # On old ESLint versions
+          - eslint: 6
+            node: 14
+            os: ubuntu-latest
+          - eslint: 5
+            node: 14
+            os: ubuntu-latest
+          # On the minimum supported ESLint/Node.js version
+          - eslint: 5
+            node: 6.14
+            os: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     steps:
     - name: Checkout
-      uses: actions/checkout@v1
-      with:
-        fetch-depth: 1
+      uses: actions/checkout@v2
     - name: Install Node.js v${{ matrix.node }}
       uses: actions/setup-node@v1
       with:
         node-version: ${{ matrix.node }}
+    - name: Install npm@^6.0.0
+      if: ${{ matrix.node >= 6 && matrix.node < 7 }}
+      run: npm install --global npm@^6.0.0
     - name: Install Packages
-      run: |
-        if [ ${{ matrix.node }} -eq 6 ]; then
-          npm install --global npm@^6.0.0
-        fi
-        npm install
-    - name: Install ESLint v${{ matrix.eslint }}
-      run: npm install --no-save eslint@^${{ matrix.eslint }}.0.0
+      run: npm install
+    - name: Install ESLint ${{ matrix.eslint }}
+      run: npm install --no-save eslint@${{ matrix.eslint }}
     - name: Build
       run: npm run -s build
     - name: Test

package.json

@@ -3,7 +3,7 @@
   "version": "2.1.0",
   "description": "Utilities for ESLint plugins.",
   "engines": {
-    "node": ">=6"
+    "node": ">=6.14"
   },
   "sideEffects": false,
   "main": "index",
@@ -12,15 +12,15 @@
     "index.*"
   ],
   "dependencies": {
-    "eslint-visitor-keys": "^1.1.0"
+    "eslint-visitor-keys": "^1.3.0"
   },
   "devDependencies": {
-    "@mysticatea/eslint-plugin": "^12.0.0",
+    "@mysticatea/eslint-plugin": "^13.0.0",
     "codecov": "^3.6.1",
     "dot-prop": "^4.2.0",
-    "eslint": "^6.5.1",
+    "eslint": "^7.3.1",
     "esm": "^3.2.25",
-    "espree": "^6.1.1",
+    "espree": "^7.1.0",
     "mocha": "^6.2.2",
     "npm-run-all": "^4.1.5",
     "nyc": "^14.1.1",
@@ -32,6 +32,9 @@
     "vuepress": "^1.2.0",
     "warun": "^1.0.0"
   },
+  "peerDependencies": {
+    "eslint": ">=5"
+  },
   "scripts": {
     "prebuild": "npm run -s clean",
     "build": "rollup -c",