Boosted 4.2.2 fixes npm package from 4.2.1

boosted npm package v4.2.1 miss fonts and img folder in dist. This version fix that.

Remember of v4.2.1 release note
Here's the merge of Bootstrap 4.2.0 and 4.2.1 Bootstrap release note 4.2.0 Bootstrap release note 4.2.1

In Boosted we've work on brand alignement, and some bugfixes.

Here's the specific release note :

Bug Fixes

• accordions: collapse with option .multi doest work. elements selector was broken (388abaa)
• alerts: create outlined alerts with icons
• build: fix css prefix docs task to apply on the good path (98a2774)
• collapse: remove custom boosted aria-collapse attribute management from the plugin as it's manage in native by bootstrap now ([9913ad6]
• forms: update input form border color and invalid/valid states. Rework toggle switch following custom-switch added by bootstrap
• pagination: Update active and hover states and fix issue #89 remove hard coded value for pagination and use variable instead (1693b44)
• rtl: improve boosted rtl file. Fix icons flip on rtl mode

Features

• buttons: add new social network buttons, and create a new xlg button.
• umd: update js build with umd to take into account boosted specific plugins (f3b2b60)