breaking: drop eslint < 7

.eslintrc

@@ -5,10 +5,7 @@
     "node": true
   },
   "parserOptions": {
-    "ecmaFeatures": {
-      "impliedStrict": true
-    },
-    "ecmaVersion": 2017
+    "ecmaVersion": 2018
   },
   "plugins": ["json"],
   "root": true

.github/workflows/node.yml

@@ -27,32 +27,9 @@ jobs:
         eslint:
           - 8
           - 7
-          - 6
-          - 5
-          - 4
-          - 3
         include:
           - node-version: 14
             eslint: 7.7
-          - node-version: 8
-            eslint: 6
-          - node-version: 8
-            eslint: 5
-          - node-version: 8
-            eslint: 4
-          - node-version: 8
-            eslint: 3
-          - node-version: 6
-            eslint: 5
-            ajv: 5
-          - node-version: 6
-            eslint: 4
-          - node-version: 6
-            eslint: 3
-          - node-version: 4
-            eslint: 4
-          - node-version: 4
-            eslint: 3
         exclude:
           - node-version: 15
             eslint: 8
@@ -71,12 +48,6 @@ jobs:
           node-version: ${{ matrix.node-version }}
           skip-ls-check: true
       - run: npm install --no-save eslint@${{ matrix.eslint }}
-      - run: npm install --no-save "ajv@${{ matrix.ajv }}"
-        if: ${{ !!matrix.ajv }}
-      - run: npm install --no-save "ajv@5"
-        if: ${{ !matrix.ajv && matrix.eslint == 4 }}
-      - run: npm install --no-save "ajv@6"
-        if: ${{ !matrix.ajv && matrix.eslint == 5 }}
       - run: npm install --no-save @eslint/eslintrc@0
         if: ${{ matrix.eslint != 8 }}
       - run: npm prune > /dev/null

package.json

@@ -50,7 +50,7 @@
     "commitizen": "^2.10.1",
     "create-require": "^1.1.1",
     "cz-conventional-changelog": "^2.1.0",
-    "eslint": "^3.12.0 || ^4 || ^5 || ^6 || ^7 || ^8",
+    "eslint": "^7 || ^8.2.0",
     "eslint-plugin-json": "^3.1.0",
     "ghooks": "^2.0.4",
     "in-publish": "^2.0.1",
@@ -65,7 +65,7 @@
     "validate-commit-msg": "^2.14.0"
   },
   "peerDependencies": {
-    "eslint": "^3.12.0 || ^4 || ^5 || ^6 || ^7 || ^8"
+    "eslint": "^7 || ^8.2.0"
   },
   "nyc": {
     "exclude": [
@@ -107,6 +107,6 @@
   },
   "homepage": "https://github.com/sarbbottam/eslint-find-rules#readme",
   "engines": {
-    "node": ">= 4"
+    "node": "^10.12.0 || >=12.0.0 || ^14.17.0 || >=16.0.0"
   }
 }

src/lib/normalize-plugin-name.js

@@ -27,80 +27,6 @@ function _getNormalizer() {
         getShorthandName: naming.getShorthandName
       }
     },
-    // eslint >= 6.1.0
-    function () {
-      const normalizer = require('eslint/lib/shared/naming');
-
-      return {
-        normalizePackageName: normalizer.normalizePackageName,
-        getShorthandName: normalizer.getShorthandName
-      };
-    },
-    // eslint 6.0.0 - 6.0.1
-    function () {
-      const normalizer = require('eslint/lib/cli-engine/naming');
-
-      return {
-        normalizePackageName: normalizer.normalizePackageName,
-        getShorthandName: normalizer.getShorthandName
-      };
-    },
-    // eslint 5
-    function () {
-      const normalizer = require('eslint/lib/util/naming');
-
-      return {
-        normalizePackageName: normalizer.normalizePackageName,
-        getShorthandName: normalizer.getShorthandName
-      };
-    },
-    // eslint 4
-    function () {
-      const normalizer = require('eslint/lib/util/naming');
-
-      return {
-        normalizePackageName: normalizer.normalizePackageName,
-        getShorthandName: normalizer.removeNamespaceFromTerm
-      };
-    },
-    // eslint 3
-    function () {
-      const normalizer = require('eslint/lib/config/plugins');
-
-      const PLUGIN_NAME_PREFIX = 'eslint-plugin-';
-
-      function parsePluginName(pluginName) {
-        const pluginNamespace = normalizer.getNamespace(pluginName);
-        const pluginNameWithoutNamespace = normalizer.removeNamespace(pluginName);
-        const pluginNameWithoutPrefix = normalizer.removePrefix(pluginNameWithoutNamespace);
-
-        return {
-          pluginNamespace,
-          pluginNameWithoutPrefix
-        };
-      }
-
-      function normalizePackageName(pluginName) {
-        const sections = parsePluginName(pluginName);
-        const longName = sections.pluginNamespace +
-          PLUGIN_NAME_PREFIX +
-          sections.pluginNameWithoutPrefix;
-
-        return longName;
-      }
-
-      function getShorthandName(pluginName) {
-        const sections = parsePluginName(pluginName);
-        const shortName = sections.pluginNamespace + sections.pluginNameWithoutPrefix;
-
-        return shortName;
-      }
-
-      return {
-        normalizePackageName,
-        getShorthandName
-      };
-    }
   ];
 
   for (const tryEslintVersion of eslintVersionFunctions) {