display an error when node version is < 16

cli/index.js

@@ -2,7 +2,12 @@
 
 "use strict";
 
-const fs = require("fs");
+// check node version before anything else
+const nodeVersion = process.versions.node.split(".");
+if (nodeVersion[0] < 16) {
+    console.log("ERROR: Node version 16 or higher is required.");
+    process.exit(1);
+}
 
 // parse .env file into process.env
 require('dotenv').config();
@@ -11,7 +16,7 @@ const cryptoEngine = require("../lib/cryptoEngine.js");
 const codec = require("../lib/codec.js");
 const { generateRandomSalt } = cryptoEngine;
 const { encode } = codec.init(cryptoEngine);
-const { parseCommandLineArguments, buildStaticryptJS, isOptionSetByUser, genFile, getPassword, getFileContent, getSalt,
+const { parseCommandLineArguments, buildStaticryptJS, isOptionSetByUser, genFile, getFileContent,
     getValidatedSalt,
     getValidatedPassword, getConfig, writeConfig
 } = require("./helpers.js");

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "staticrypt",
-  "version": "3.1.0",
+  "version": "3.1.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "staticrypt",
-      "version": "3.1.0",
+      "version": "3.1.1",
       "license": "MIT",
       "dependencies": {
         "dotenv": "^16.0.3",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "staticrypt",
-  "version": "3.1.0",
+  "version": "3.1.1",
   "description": "Based on the [crypto-js](https://github.com/brix/crypto-js) library, StatiCrypt uses AES-256 to encrypt your input with your passphrase and put it in a HTML file with a password prompt that can decrypted in-browser (client side).",
   "main": "index.js",
   "files": [