Require Node.js 14 and move to ESM

Author: sindresorhus

.github/workflows/main.yml

@@ -10,10 +10,9 @@ jobs:
       fail-fast: false
       matrix:
         node-version:
+          - 18
+          - 16
           - 14
-          - 12
-          - 10
-          - 8
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3