Drop support for Node 6

.eslintrc.js

@@ -4,7 +4,7 @@ module.exports = {
 
     "extends": [
 
-        "@futagoza/node/6",
+        "@futagoza/node/8",
         // "@futagoza/typescript",
         "@futagoza/vue",
 

.github/workflows/main.yml

@@ -34,7 +34,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [ 6.x, 8.x, 10.x, 12.x ]
+        node-version: [ 8.x, 10.x, 12.x ]
 
     steps:
     - uses: actions/checkout@master

CHANGELOG.md

@@ -9,9 +9,9 @@
 * [Implemented value plucking](https://github.com/pegjs/pegjs/commit/460f0cc5bc9e7b12e7830a13a9afa5026a5f20f4): e.g. When `grammar = "-" @$[a-z]i* "-"` is given `-PEGjs-`, it returns `PEGjs`
 * Upgraded JavaScript support:
   - Parser's are generated in ES5
-  - Source code for PEG.js and scripts in the repository are written in ES2015, for Node 6+
+  - Source code for PEG.js and scripts in the repository are written in ES2015, for Node 8+
   - The browser release is in ES5, generated using [Rollup](https://rollupjs.org/) and [Babel](https://babeljs.io/)
-  - Dropped support for Node versions _0.x_, _4_ and _non-LTS_ versions (e.g. `5`, `7`, etc)
+  - Dropped support for Node versions _0.x_, _4_, _6_ and _non-LTS_ versions (e.g. `7`, `9`, etc)
   - Dropped support for IE versions _8_, _9_ and _10_
 * Updated documentation:
   - extracted to separate markdown files in the [docs folder](https://github.com/pegjs/pegjs/tree/master/docs)

docs/guides/compatibility.md

@@ -2,7 +2,7 @@
 
 Both the parser generator and generated parsers should run well in the following environments:
 
-* Node.js v6+
+* Node.js 8+
 * Internet Explorer 11
 * Microsoft Edge
 * Firefox

package.json

@@ -35,6 +35,6 @@
         "vuepress": "1.1.0"
     },
     "engines": {
-        "node": ">= 6"
+        "node": ">= 8"
     }
 }

packages/pegjs/package.json

@@ -22,6 +22,6 @@
     "main": "lib/peg.js",
     "bin": "bin/peg.js",
     "engines": {
-        "node": ">= 6"
+        "node": ">= 8"
     }
 }