Markers for 4.0.0 (#87)

* changes to switch to use Node 20, and add lines to help dwhite work around license issue.

* Changed/Added code to handle using the content of a license file or the license file itself

* Changes to setup markings for a 4.0.0 release

README.md

@@ -10,7 +10,7 @@ nuodb driver supports basic features of the NuoDB Database and NuoDB C++ client.
 
 ## Dependencies
 
-Node 16.13.2
+Node 20.18.0
 
 ## Installation
 

package.json

@@ -3,7 +3,7 @@
   "author": "Dassault Systèmes SE",
   "description": "The official NuoDB database driver for Node.js. Provides a high-level SQL API on top of the NuoDB Node.js Addon.",
   "license": "BSD-3-Clause",
-  "version": "3.7.4",
+  "version": "4.0.0",
   "main": "index.js",
   "keywords": [
     "nuodb",