Get rid of NPM undocumented dependency

WEB WEB Feature Requests
1

Currently, there is a dependency to NPM for code obfuscation.
You could at least implement minification like with this code:
https://bitbucket.org/egrange/dwscript/src/master/Libraries/JSCodeGen/dwsJSMin.pas

2

Since v1.5, the dependency to npm for obfuscation is removed.

3

This feature was implemented.

4