Drop support for Node before v20 & update CI step versions

Author: pimterry

.github/workflows/ci.yml

@@ -7,12 +7,12 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x, 14.x, 16.x, 18.x, 20.x, v20.8.0, '*']
+        node-version: [20.x, 22.x, '*']
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
-      - uses: actions/setup-node@v3
+      - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
           check-latest: true

README.md

@@ -16,7 +16,7 @@ Forked from the original [`httpolyglot`](https://github.com/mscdex/httpolyglot)
 Requirements
 ============
 
-* [node.js](http://nodejs.org/) -- v12.0.0 or newer
+* [node.js](http://nodejs.org/) -- v20 or newer
 
 
 Install

package.json

@@ -17,7 +17,7 @@
     "test": "mocha -r ts-node/register 'test/**/*.spec.ts'"
   },
   "engines": {
-    "node": ">=12.0.0"
+    "node": ">=20.0.0"
   },
   "keywords": [
     "http",