Drop Node.js 18 support (#1302)

Resolved #1259 

TODO
- [x] Remove CI by Node.js 18 from Status checks that are required.

Author: eucyt

.github/workflows/deploy-doc.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
-          node-version: 18
+          node-version: 24
 
       - name: Setup Pages
         uses: actions/configure-pages@983d7736d9b0ae728b81ab479565c72886d7745b # v5.0.0

.github/workflows/generate-code.yml

@@ -25,7 +25,7 @@ jobs:
       - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         id: setup_node_id
         with:
-          node-version: 18
+          node-version: 24
       - name: Set up Java
         uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.7.1
         with:

.github/workflows/release.yml

@@ -20,7 +20,7 @@ jobs:
     # Setup .npmrc file to publish to GitHub Packages
     - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
       with:
-        node-version: 18
+        node-version: 24
         registry-url: 'https://registry.npmjs.org'
     - run: npm install
     - name: Update version in package.json, package-lock.json, and lib/version.ts

.github/workflows/test.yml

@@ -15,7 +15,6 @@ jobs:
       matrix:
         # https://nodejs.org/en/about/releases/
         node:
-          - '18'
           - '20'
           - '20.12.2'
           - '22'

README.md

@@ -18,7 +18,7 @@ line-bot-sdk-nodejs documentation: https://line.github.io/line-bot-sdk-nodejs/#g
 
 ## Requirements
 
-* **Node.js** 18 or higher
+* **Node.js** 20 or higher
 
 ## Installation
 

docs/getting-started/requirements.md

@@ -1,6 +1,6 @@
 # Requirements
 
-* **Node.js** >= 18.
+* **Node.js** >= 20.
   * It uses ES2022.
 * [**npm**](https://www.npmjs.com/), preferably >=10
 

examples/echo-bot-esm/package-lock.json

@@ -6,7 +6,7 @@ This tutorial will help you set up a LINE Echo Bot from scratch.
 
 ## Prerequisite
 
-- Node.js version 18 or higher
+- Node.js version 20 or higher
 - You've created a channel in the LINE Developers Console, and got your channel access token and channel secret.
   - Read https://developers.line.biz/en/docs/messaging-api/getting-started/#using-console if you haven't done this yet.
 

examples/echo-bot-ts-cjs/README.md

@@ -6,7 +6,7 @@ This tutorial will help you set up a LINE Echo Bot from scratch.
 
 ## Prerequisite
 
-- Node.js version 18 or higher
+- Node.js version 20 or higher
 - You've created a channel in the LINE Developers Console, and got your channel access token and channel secret.
   - Read https://developers.line.biz/en/docs/messaging-api/getting-started/#using-console if you haven't done this yet.