feat: Support ESLint 7.x (#92)

* feat: Support ESLint 7.x

* fix: Fix ESLint errors

* Update .travis.yml

* chore: Update dependencies

* chore: Update dependencies

* fix: Cleanup yarn.lock

* fix: Fix ESLint errors

* chore: Don't check for engines in tests

* [Breaking] drop support for all but eslint 6/7, and jest 25/26

* Add engines to make the minimum required Node version more clear

* Update ESLint plugins to latest version

Co-authored-by: Jordan Harband <[email protected]>

Author: MichaelDeBoey

.travis.yml

@@ -1,54 +1,21 @@
 language: node_js
 node_js:
-  - '12'
-  - '10'
-  - '8'
-  - '6'
+  # eslint 7: node 10.12+
+  # jest 26: node 10.14.2+
+  - 14
+  - 12
+  - 10
 install:
-  - 'yarn add "eslint@${ESLINT}" "jest@${JEST}" "babel-jest@${JEST}"'
-  - 'yarn'
+  - 'yarn add "eslint@${ESLINT}" "jest@${JEST}" "babel-jest@${JEST}" --ignore-engines'
+  - 'yarn --ignore-engines'
 env:
-  - 'ESLINT=4 JEST=24'
-  - 'ESLINT=5 JEST=24'
-  - 'ESLINT=6 JEST=24'
-  - 'ESLINT=4 JEST=25'
-  - 'ESLINT=5 JEST=25'
   - 'ESLINT=6 JEST=25'
-  - 'ESLINT=4 JEST=26'
-  - 'ESLINT=5 JEST=26'
+  - 'ESLINT=7 JEST=25'
   - 'ESLINT=6 JEST=26'
+  - 'ESLINT=7 JEST=26'
 matrix:
-  exclude:
-    # exclude eslint 6 on node 6
-    - node_js: '6'
-      env: 'ESLINT=6 JEST=24'
-    - node_js: '6'
+  # jest 25: node 8+
+  include:
+    # eslint 6, node 8
+    - node_js: 8
       env: 'ESLINT=6 JEST=25'
-    # exclude jest 25 on node 6
-    - node_js: '6'
-      env: 'ESLINT=4 JEST=25'
-    - node_js: '6'
-      env: 'ESLINT=5 JEST=25'
-    - node_js: '6'
-      env: 'ESLINT=6 JEST=25'
-    # exclude jest 25 on node 8
-    - node_js: '8'
-      env: 'ESLINT=4 JEST=25'
-    - node_js: '8'
-      env: 'ESLINT=5 JEST=25'
-    - node_js: '8'
-      env: 'ESLINT=6 JEST=25'
-    # exclude jest 26 on node 6
-    - node_js: '6'
-      env: 'ESLINT=4 JEST=26'
-    - node_js: '6'
-      env: 'ESLINT=5 JEST=26'
-    - node_js: '6'
-      env: 'ESLINT=6 JEST=26'
-    # exclude jest 26 on node 8
-    - node_js: '8'
-      env: 'ESLINT=4 JEST=26'
-    - node_js: '8'
-      env: 'ESLINT=5 JEST=26'
-    - node_js: '8'
-      env: 'ESLINT=6 JEST=26'

package.json

@@ -27,32 +27,35 @@
     "chalk": "^2.4.1",
     "cosmiconfig": "^5.0.0",
     "create-jest-runner": "^0.5.3",
-    "eslint": "^4.0.0 || ^5.0.0 || ^6.0.0"
+    "eslint": "^6 || ^7"
   },
   "devDependencies": {
     "@babel/cli": "^7.1.0",
     "@babel/core": "^7.1.0",
     "@babel/preset-env": "~7.7.0",
     "babel-jest": "^25.1.0",
-    "eslint-config-airbnb-base": "^13.1.0",
-    "eslint-config-prettier": "^4.3.0",
-    "eslint-plugin-import": "^2.14.0",
-    "eslint-plugin-jest": "^22.6.4",
-    "eslint-plugin-prettier": "^3.1.0",
+    "eslint-config-airbnb-base": "^14.2.0",
+    "eslint-config-prettier": "^6.11.0",
+    "eslint-plugin-import": "^2.22.0",
+    "eslint-plugin-jest": "^23.17.1",
+    "eslint-plugin-prettier": "^3.1.4",
     "execa": "^1.0.0",
-    "jest": "^21.0.0 || ^22.0.0 || ^23.0.0 || ^24.0.0 || ^25.1.0 || ^26.0.0",
+    "jest": "^25.1 || ^26",
     "jest-watch-select-projects": "^0.1.1",
     "jest-watch-typeahead": "^0.3.1",
     "prettier": "^1.14.3",
     "rimraf": "^2.6.2"
   },
   "peerDependencies": {
-    "eslint": "^4.0.0 || ^5.0.0 || ^6.0.0",
-    "jest": "^21.0.0 || ^22.0.0 || ^23.0.0 || ^24.0.0 || ^25.1.0 || ^26.0.0"
+    "eslint": "^6 || ^7",
+    "jest": "^25.1 || ^26"
   },
   "prettier": {
     "proseWrap": "never",
     "singleQuote": true,
     "trailingComma": "all"
+  },
+  "engines": {
+    "node": ">=8.10.0"
   }
 }

src/utils/normalizeConfig.js

@@ -114,16 +114,18 @@ const normalizeCliOptions = rawConfig =>
 
     const value = rawConfig[key] !== undefined ? rawConfig[key] : defaultValue;
 
-    return Object.assign({}, config, {
+    return {
+      ...config,
       [name]: transform(value),
-    });
+    };
   }, {});
 /* eslint-enable no-param-reassign */
 
 const normalizeConfig = config => {
-  return Object.assign({}, config, {
+  return {
+    ...config,
     cliOptions: normalizeCliOptions(config.cliOptions || {}),
-  });
+  };
 };
 
 module.exports = normalizeConfig;

src/watchFixPlugin/__tests__/index.test.js

@@ -12,7 +12,7 @@ describe('watchFixPlugin', () => {
   beforeEach(() => {
     jest.resetModules();
     configOverrides = require('../../utils/configOverrides');
-    WatchFixPlugin = require('../');
+    WatchFixPlugin = require('..');
   });
 
   it('shows the correct prompt', async () => {