Bump bootstrap-sass from 3.1.1.1 to 3.4.1

Bumps [bootstrap-sass](https://github.com/twbs/bootstrap-sass) from 3.1.1.1 to 3.4.1.
- [Release notes](https://github.com/twbs/bootstrap-sass/releases)
- [Changelog](https://github.com/twbs/bootstrap-sass/blob/master/CHANGELOG.md)
- [Commits](https://github.com/twbs/bootstrap-sass/commits/v3.4.1)

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile

@@ -20,7 +20,7 @@ group :assets do
   gem 'coffee-rails', '~> 3.2.1'
   gem 'jquery-ui-rails'
   # files for bootstrap-in-asset-pipeline integration
-  gem 'bootstrap-sass', '~> 3.1.1.1'
+  gem 'bootstrap-sass', '~> 3.4.1'
   # extension's packaging of html5shiv for the asset pipeline
   gem 'extension-html5shiv-rails', :require => 'html5shiv-rails', :source => 'https://engineering.extension.org/rubygems/'
   # replaces glyphicons

Gemfile.lock

@@ -34,14 +34,17 @@ GEM
     arel (3.0.3)
     auto_strip_attributes (2.0.4)
       activerecord (>= 3.0)
+    autoprefixer-rails (9.7.1)
+      execjs
     bcrypt-ruby (3.0.1)
     better_errors (1.0.1)
       coderay (>= 1.0.0)
       erubis (>= 2.6.6)
     binding_of_caller (0.7.2)
       debug_inspector (>= 0.0.1)
-    bootstrap-sass (3.1.1.1)
-      sass (~> 3.2)
+    bootstrap-sass (3.4.1)
+      autoprefixer-rails (>= 5.2.1)
+      sassc (>= 2.0.0)
     breadcrumbs_on_rails (2.3.0)
     builder (3.0.4)
     callsite (0.0.11)
@@ -86,6 +89,7 @@ GEM
     extension-html5shiv-rails (3.6.2.1)
     faraday (0.13.1)
       multipart-post (>= 1.2, < 3)
+    ffi (1.11.1)
     font-awesome-rails (4.0.3.1)
       railties (>= 3.2, < 5.0)
     geocoder (1.1.8)
@@ -226,6 +230,9 @@ GEM
       rdoc (~> 3.4)
       thor (>= 0.14.6, < 2.0)
     rake (11.3.0)
+    rb-fsevent (0.10.3)
+    rb-inotify (0.10.0)
+      ffi (~> 1.0)
     rdoc (3.12.2)
       json (~> 1.4)
     redis (3.0.4)
@@ -265,11 +272,17 @@ GEM
     ruby-openid (2.7.0)
     safe_attributes (1.0.10)
       activerecord (>= 3.0.0)
-    sass (3.2.12)
+    sass (3.7.4)
+      sass-listen (~> 4.0.0)
+    sass-listen (4.0.0)
+      rb-fsevent (~> 0.9, >= 0.9.4)
+      rb-inotify (~> 0.9, >= 0.9.7)
     sass-rails (3.2.6)
       railties (~> 3.2.0)
       sass (>= 3.1.10)
       tilt (~> 1.3)
+    sassc (2.2.1)
+      ffi (~> 1.9)
     select2-rails (3.5.9.3)
       thor (~> 0.14)
     sidekiq (2.14.0)
@@ -330,7 +343,7 @@ DEPENDENCIES
   bcrypt-ruby (~> 3.0.0)
   better_errors
   binding_of_caller
-  bootstrap-sass (~> 3.1.1.1)
+  bootstrap-sass (~> 3.4.1)
   breadcrumbs_on_rails
   capatross
   capistrano (~> 2.15.5)