Summary

• Updated the Socicon to the latest version.
• Added new Twitter Logo as SVG and necessary CSS to keep the formating.

Will affect visual aspect of the product

YES

Screenshots

Before

After

Test instructions

• In the Social Sharing Module activate the Twitter logo.
• Check the page on both desktop and mobile.

Check before Pull Request is ready:

• I have written a test and included it in this PR
• I have run all tests and they pass
• The code passes when running the PHP CodeSniffer
• Code meets WordPress Coding Standards for PHP, HTML, CSS and JS
• Security and Sanitization requirements have been followed
• I have assigned a reviewer or two to review this PR (if you're not sure who to assign, we can do this step for you)

Closes #836