Update to Node.js v20

.devcontainer/Dockerfile

@@ -1,4 +1,4 @@
-ARG VARIANT="18"
+ARG VARIANT="20"
 
 FROM mcr.microsoft.com/vscode/devcontainers/javascript-node:${VARIANT}
 

.devcontainer/devcontainer.json

@@ -3,7 +3,7 @@
   "build": {
     "dockerfile": "Dockerfile",
     "args": {
-      "VARIANT": "18"
+      "VARIANT": "20"
     }
   },
   "extensions": [

.github/actions/setup/action.yml

@@ -9,7 +9,7 @@ inputs:
   node_version:
     description: The Node.js version.
     required: false
-    default: '18'
+    default: '20'
   registry_url:
     description: The Node.js package registry URL.
     required: false

.github/workflows/_build.yml

@@ -8,7 +8,7 @@ on:
         description: The Node.js version.
         type: string
         required: false
-        default: '18'
+        default: '20'
     secrets:
       node_auth_token:
         description: The Node.js auth token.

.github/workflows/check.yml

@@ -17,8 +17,8 @@ jobs:
         os:
           - ubuntu-latest
         node:
-          - '16'
           - '18'
+          - '20'
         include:
           - os: ubuntu-latest
             os_name: Linux
@@ -40,8 +40,8 @@ jobs:
       fail-fast: false
       matrix:
         node:
-          - '16'
           - '18'
+          - '20'
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -68,8 +68,8 @@ jobs:
         os:
           - ubuntu-latest
         node:
-          - '16'
           - '18'
+          - '20'
         include:
           - os: ubuntu-latest
             os_name: Linux
@@ -125,8 +125,8 @@ jobs:
       fail-fast: false
       matrix:
         node:
-          - '16'
           - '18'
+          - '20'
     steps:
       - name: Checkout
         uses: actions/checkout@v3

.nvmrc

@@ -1 +1 @@
-lts/hydrogen
+20

package.json

@@ -54,11 +54,11 @@
     "report": "c8 report"
   },
   "engines": {
-    "node": ">=16.13.0",
-    "npm": ">= 8.1.0"
+    "node": ">=18.12.0",
+    "npm": ">= 9.0.0"
   },
   "devDependencies": {
-    "@types/node": "^18.11.18",
+    "@types/node": "^20.8.10",
     "ava": "^5.0.1",
     "c8": "^8.0.0",
     "del-cli": "^5.0.0",