chore: drop node@6 support

BREAKING CHANGE: Minimum node version is now 8

closes #410

Author: G-Rath

.github/workflows/nodejs.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [6.x, 8.x, 10.x, 12.x, 13.x]
+        node-version: [8.x, 10.x, 12.x, 13.x]
     runs-on: ubuntu-latest
 
     steps:

.travis.yml

@@ -3,7 +3,6 @@ node_js:
 - 12
 - 10
 - 8
-- 6
 - node
 before_install:
 - curl -o- -L https://yarnpkg.com/install.sh | bash

babel.config.js

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

package.json

@@ -20,7 +20,7 @@
   ],
   "main": "lib/",
   "engines": {
-    "node": ">=6"
+    "node": ">=8"
   },
   "peerDependencies": {
     "eslint": ">=5"