Bump bootstrap-sass from 3.3.7 to 3.4.1

Bumps [bootstrap-sass](https://github.com/twbs/bootstrap-sass) from 3.3.7 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](twbs/bootstrap-sass@v3.3.7...v3.4.1)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Gemfile

@@ -96,7 +96,7 @@ gem "octokit", "~> 3.0"
 gem 'jquery-textcomplete-rails'
 
 # https://github.com/twbs/bootstrap-sass
-gem 'bootstrap-sass', '~> 3.3.4'
+gem 'bootstrap-sass', '~> 3.4.1'
 
 # haml
 gem 'haml-rails'

Gemfile.lock

@@ -46,14 +46,14 @@ GEM
     archive-zip (0.12.0)
       io-like (~> 0.3.0)
     arel (9.0.0)
-    autoprefixer-rails (9.8.6.5)
-      execjs
+    autoprefixer-rails (10.2.5.0)
+      execjs (< 2.8.0)
     bindex (0.8.1)
     bootsnap (1.4.8)
       msgpack (~> 1.0)
-    bootstrap-sass (3.3.7)
+    bootstrap-sass (3.4.1)
       autoprefixer-rails (>= 5.2.1)
-      sass (>= 3.3.4)
+      sassc (>= 2.0.0)
     builder (3.2.4)
     byebug (11.1.3)
     capybara (3.32.2)
@@ -82,7 +82,7 @@ GEM
     execjs (2.7.0)
     faraday (0.9.2)
       multipart-post (>= 1.2, < 3)
-    ffi (1.13.1)
+    ffi (1.15.0)
     font-awesome-sass (4.7.0)
       sass (>= 3.2)
     gemoji (3.0.1)
@@ -151,7 +151,9 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (1.0.0)
-    mimemagic (0.3.5)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
     minitest (5.14.2)
@@ -212,7 +214,7 @@ GEM
       rake (>= 0.8.7)
       thor (>= 0.19.0, < 2.0)
     rake (13.0.1)
-    rb-fsevent (0.10.4)
+    rb-fsevent (0.11.0)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     regexp_parser (1.7.1)
@@ -238,6 +240,8 @@ GEM
       sprockets (>= 2.8, < 4.0)
       sprockets-rails (>= 2.0, < 4.0)
       tilt (>= 1.1, < 3)
+    sassc (2.4.0)
+      ffi (~> 1.9)
     sawyer (0.6.0)
       addressable (~> 2.3.5)
       faraday (~> 0.8, < 0.10)
@@ -285,7 +289,7 @@ PLATFORMS
 
 DEPENDENCIES
   bootsnap (>= 1.1.0)
-  bootstrap-sass (~> 3.3.4)
+  bootstrap-sass (~> 3.4.1)
   byebug
   capybara (>= 2.15)
   chromedriver-helper