Add work-around to ensure building works with Node.js 16+

Node.js 16+ supports dynamically linking with OpenSSL 3.0, however, that
results in 'error:0308010C:digital envelope routines::unsupported' error.

To work-around that with the legacy Webpack 4.0 we use, one needs to
enable the OpenSSL 3.0 Legacy provider by setting:
NODE_OPTIONS=--openssl-legacy-provider

For more info, see:
- webpack/webpack#14532
- nodejs/node#40455
- nodejs/node#40948

package.json

@@ -3,9 +3,9 @@
   "version": "1.9.0",
   "private": true,
   "scripts": {
-    "build": "webpack --mode production",
-    "buildProd": "webpack --mode production",
-    "dev": "webpack --mode development --progress --watch",
+    "build": "env NODE_OPTIONS=--openssl-legacy-provider webpack --mode production",
+    "buildProd": "env NODE_OPTIONS=--openssl-legacy-provider webpack --mode production",
+    "dev": "env NODE_OPTIONS=--openssl-legacy-provider webpack --mode development --progress --watch",
     "lint": "yarn run eslint src",
     "test": "jest"
   },