Require Node.js 18 (#7)

.github/workflows/main.yml

@@ -4,18 +4,21 @@ on:
   - pull_request
 jobs:
   test:
-    name: Node.js ${{ matrix.node-version }}
-    runs-on: ubuntu-latest
+    name: Node.js ${{ matrix.node-version }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
         node-version:
-          - 16
-          - 14
-          - 12
+          - 20
+          - 18
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install

index.js

@@ -1,12 +1,12 @@
 export default function stripFinalNewline(input) {
-	const LF = typeof input === 'string' ? '\n' : '\n'.charCodeAt();
-	const CR = typeof input === 'string' ? '\r' : '\r'.charCodeAt();
+	const LF = typeof input === 'string' ? '\n' : '\n'.codePointAt();
+	const CR = typeof input === 'string' ? '\r' : '\r'.codePointAt();
 
-	if (input[input.length - 1] === LF) {
+	if (input.at(-1) === LF) {
 		input = input.slice(0, -1);
 	}
 
-	if (input[input.length - 1] === CR) {
+	if (input.at(-1) === CR) {
 		input = input.slice(0, -1);
 	}
 

package.json

@@ -13,7 +13,7 @@
 	"type": "module",
 	"exports": "./index.js",
 	"engines": {
-		"node": ">=12"
+		"node": ">=18"
 	},
 	"scripts": {
 		"test": "xo && ava"
@@ -37,7 +37,7 @@
 		"buffer"
 	],
 	"devDependencies": {
-		"ava": "^3.15.0",
-		"xo": "^0.39.1"
+		"ava": "^6.0.1",
+		"xo": "^0.56.0"
 	}
 }

test.js

@@ -1,3 +1,4 @@
+import {Buffer} from 'node:buffer';
 import test from 'ava';
 import stripFinalNewline from './index.js';