chore: use node 20 (LTS) & drop 14, 16 (#142)

Node 20 enters LTS tomorrow - build and test on it as the main version.
Node 14 and 16 are both EoL already, drop support for them

BREAKING CHANGE: Drops support for EoL Node 14 and 16

.devcontainer/Dockerfile

@@ -1 +1 @@
-FROM mcr.microsoft.com/vscode/devcontainers/javascript-node:0-18
+FROM mcr.microsoft.com/vscode/devcontainers/javascript-node:0-20

.github/workflows/build.yml

@@ -7,7 +7,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version: 20
           cache: yarn
       - run: yarn install --frozen-lockfile
       - run: yarn format:check
@@ -16,7 +16,7 @@ jobs:
       - run: yarn build
       - run: yarn test
 
-      - name: test built package
+      - name: test built package on node@20
         run: |
           mkdir ../foo
           cd ../foo
@@ -32,4 +32,18 @@ jobs:
             assert.strictEqual(esbuildPluginBrowserslist().name, 'esbuild-plugin-browserslist');
             assert.strictEqual(resolveToEsbuildTarget(['chrome 90'])[0], 'chrome90');
           " > test.js
+
+          node -v
+          node test.js
+
+      # Not using a matrix here since it's simpler
+      # to just duplicate it and not spawn new instances
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 18
+      - name: test build package on node@18
+        run: |
+          cd ../foo
+
+          node -v
           node test.js

.github/workflows/publish.yml

@@ -45,7 +45,7 @@ jobs:
           fetch-depth: 0
       - uses: actions/setup-node@v3
         with:
-          node-version: 18
+          node-version: 20
           registry-url: 'https://registry.npmjs.org'
           cache: 'yarn'
       - run: yarn install --frozen-lockfile

package.json

@@ -11,7 +11,7 @@
   "main": "./dist/index.js",
   "types": "./dist/index.d.ts",
   "engines": {
-    "node": ">=14"
+    "node": ">=18"
   },
   "files": [
     "dist"
@@ -34,8 +34,8 @@
     "zod": "^3.21.4"
   },
   "devDependencies": {
-    "@commitlint/cli": "^17.6.6",
-    "@commitlint/config-conventional": "^17.6.6",
+    "@commitlint/cli": "^18.0.0",
+    "@commitlint/config-conventional": "^18.0.0",
     "@nihalgonsalves/esconfig": "^0.6.0",
     "@types/debug": "^4.1.8",
     "@types/node": "18",