Updated font awesome library

Problem/Motivation

While going through the theme for issues I found out that the font awesome library is old which can effect the Twitter logo when added. It will add the old Twitter logo instead of the new Twitter logo X since in the current version of the font awesome updated Twitter logo is not present. I have added 2 more social icons apart from the current one RSS feed to make the issue clearer.

Steps to reproduce

Clone the issue and you will be able to see the old version of the Font Awesome library

Proposed resolution

update the font awesome library from the code to the latest

Remaining tasks

none

User interface changes

None

API changes

none

Data model changes

none