Sass deprecations

[DanielRuf]

[20:27:30] Starting 'css:compile'...
WARNING: The `text-hide()` mixin has been deprecated as of v4.1.0. It will be removed entirely in v5.
         on line 10 of node_modules/bootstrap/scss/mixins/_text-hide.scss, in mixin `text-hide`
         from line 57 of node_modules/bootstrap/scss/utilities/_text.scss
         from line 14 of node_modules/bootstrap/scss/_utilities.scss
         from line 41 of node_modules/bootstrap/scss/bootstrap.scss
         from line 4 of Assets/Scss/ckeditor.scss

WARNING: The `text-hide()` mixin has been deprecated as of v4.1.0. It will be removed entirely in v5.
         on line 10 of node_modules/bootstrap/scss/mixins/_text-hide.scss, in mixin `text-hide`
         from line 57 of node_modules/bootstrap/scss/utilities/_text.scss
         from line 14 of node_modules/bootstrap/scss/_utilities.scss
         from line 11 of Assets/Scss/main.scss

[arndmesser]

This is not an issue related to startpilot.
This is "fixed" in latest bootstrap version.

twbs/bootstrap#26242

[arndmesser]

See Ticket #75 and pull request #76