fix: do not prepend node execPath by default

Author: zkochan

lib/extendPath.js

@@ -27,7 +27,7 @@ module.exports = (wd, originalPath, nodeGyp, opts) => {
 
 function shouldPrependCurrentNodeDirToPATH (opts) {
   const cfgsetting = opts.scriptsPrependNodePath
-  if (cfgsetting === false) return false
+  if (cfgsetting === false || cfgsetting == null) return false
   if (cfgsetting === true) return true
 
   let isDifferentNodeInPath