BREAKING: Node 8, 10 and 12 support dropped

They might still work, but we're only testing v14-v18

Author: philsturgeon

.github/workflows/release.yml

@@ -13,7 +13,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: "12.x"
+          node-version: 18
       - run: npm ci
       - run: npm run build --if-present
       - run: npm test

.github/workflows/test.yml

@@ -8,9 +8,9 @@ jobs:
     strategy:
       matrix:
         node-version:
-          - 12
           - 14
           - 16
+          - 18
     steps:
     - uses: actions/checkout@v3
     - name: Use Node.js ${{ matrix.node-version }}

package.json

@@ -2,9 +2,6 @@
   "name": "@openapi-contrib/openapi-schema-to-json-schema",
   "version": "0.0.0-development",
   "description": "Converts OpenAPI Schema Object to JSON Schema",
-  "engines" : { 
-    "node" : ">=12" 
-  },
   "main": "index.js",
   "types": "index.d.ts",
   "scripts": {