feat: drop support for node 8 (#570)

BREAKING CHANGE

Author: G-Rath

.github/workflows/nodejs.yml

@@ -18,12 +18,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [8.x, 10.x, 12.x, 13.x, 14.x]
+        node-version: [10.x, 12.x, 13.x, 14.x]
         eslint-version: [5, 6, 7]
-        exclude:
-          # eslint@7 doesn't support node@8
-          - node-version: 8.x
-            eslint-version: 7
     runs-on: ubuntu-latest
 
     steps:

babel.config.js

@@ -5,6 +5,6 @@ module.exports = {
   plugins: ['replace-ts-export-assignment'],
   presets: [
     '@babel/preset-typescript',
-    ['@babel/preset-env', { targets: { node: 8 } }],
+    ['@babel/preset-env', { targets: { node: 10 } }],
   ],
 };

package.json

@@ -129,7 +129,7 @@
     "eslint": ">=5"
   },
   "engines": {
-    "node": ">=8"
+    "node": ">=10"
   },
   "release": {
     "plugins": [

tsconfig.json

@@ -3,6 +3,7 @@
     "target": "es5",
     "module": "commonjs",
     "moduleResolution": "node",
+    "lib": ["es2018"],
     "noEmit": true,
     "noImplicitReturns": true,
     "strict": true,