Dependencies Update

[Tangol]

Please note that for the next version of SitemagicCMS, there are some dependencies that need updating:

• PHPMailer 5.2.27 - Sitemagic uses 5.2.21 which has some serious security vulnerabilities!
• FontAwesome 5.8.1 - Sitemagic uses v4.5.0 (super-old!)
• jQuery 1.12.4 - Sitemagic uses 1.11.0 (super-old!)
• jQuery UI 1.12.1 - Sitemagic uses 1.10.4 (super-old!)
• TinyMCE 3.5.12 - Sitemagic uses 3.5.11 (super-old!)
• +others that I haven't spotted yet :)

All of these bring various security and performance tweaks, that shouldn't be ignored.

Thanks!