bump nodejs requirement to v16.14+ as this is now required by NSI

see https://github.com/osmlab/name-suggestion-index/issues/6014

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x, 14.x, 16.x]
+        node-version: [16.x, 18.x]
 
     steps:
     - uses: actions/checkout@v2

README.md

@@ -30,7 +30,7 @@ Come on in, the water's lovely. More help? Ping `Martin Raifer`/`tyr_asd` or `bh
 
 ## Prerequisites
 
-* [Node.js](https://nodejs.org/) version 12 or newer
+* [Node.js](https://nodejs.org/) version 16.14 or newer
 * [`git`](https://www.atlassian.com/git/tutorials/install-git/) for your platform
   * Note for Windows users:
     * Edit `$HOME\.gitconfig`:<br/>

package.json

@@ -117,7 +117,7 @@
     "vparse": "~1.1.0"
   },
   "engines": {
-    "node": ">=12"
+    "node": ">=16.14"
   },
   "browserslist": [
     "> 0.2%, last 6 major versions, Firefox ESR, maintained node versions"