fix(less): upgrade make-dir to v4 to fix security vulnerability

[jorenbroekema]

fixes https://github.com/less/less.js/issues/3806

What:

Bump make-dir to v4

Why:

There is a security vulnerability in make-dir v2:

$ npm ls semver  
[email protected] project
└─┬ [email protected]
       └── [email protected]

Which is fixed in the latest make-dir v4

Checklist:

• [x] Documentation N\A
• [x] Added/updated unit tests N\A
• [x] Code complete N\A