chore!: drop v18 (#782)

Author: metcoder95

.github/workflows/nodejs.yml

@@ -38,7 +38,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        node-version: [18.x, 20.x, 22.x]
+        node-version: [20.x, 22.x, 23.x]
     runs-on: ${{matrix.os}}
     steps:
       - uses: actions/checkout@v4

README.md

@@ -17,7 +17,7 @@
 
 Written in TypeScript.
 
-For Node.js 18.x and higher.
+For Node.js 20.x and higher.
 
 [MIT Licensed][].