Revert changes to support Node.js v18

.github/workflows/main.yml

@@ -10,8 +10,9 @@ jobs:
       fail-fast: false
       matrix:
         node-version:
-          - 20
           - 18
+          - 16
+          - 14
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
@@ -19,3 +20,7 @@ jobs:
           node-version: ${{ matrix.node-version }}
       - run: npm install
       - run: npm test
+      - uses: codecov/codecov-action@v2
+        if: matrix.node-version == 16
+        with:
+          fail_ci_if_error: true

package.json

@@ -18,7 +18,7 @@
 	"types": "./source/index.d.ts",
 	"sideEffects": false,
 	"engines": {
-		"node": ">=18"
+		"node": "^12.17.0 || ^14.13 || >=16.0.0"
 	},
 	"scripts": {
 		"test": "xo && c8 ava && tsd",