fix(fonts): Update connect-fonts-firasans and grunt-connect-fonts.

* Upgrade connect-fonts-firasans which now uses font version 3.111 to fix font rendering issues in IOS.
* Upgrade to grunt-connect-fonts fixes SVG font search parameter problem.

issue #1267
fixes #1382
Merge pull request #1384 from mozilla/issue-1267-update-fonts

fix(client): Update connect-fonts-firasans and grunt-connect-fonts. Fixed #1267