[js] exit with code 1 on uncaught exception in nodejs environment (fixes #7)

Author: RealyUniqueName

.gitignore

@@ -5,4 +5,5 @@ cSpell.json
 .idea
 lab
 .vscode
-jstack.zip
+jstack.zip
+dump

src/jstack/js/JStack.hx

@@ -150,6 +150,9 @@ class JStack {
         var error = uncaughtExceptionHandler(e);
         if(error != null && error.length > 0) {
             untyped __js__('console.log({0})', error);
+            if (isNode()) {
+                untyped __js__('process.exit(1)');
+            }
         }
     }