Bump bullet from 6.1.3 to 6.1.4

Bumps [bullet](https://github.com/flyerhzm/bullet) from 6.1.3 to 6.1.4.
- [Release notes](https://github.com/flyerhzm/bullet/releases)
- [Changelog](https://github.com/flyerhzm/bullet/blob/master/CHANGELOG.md)
- [Commits](https://github.com/flyerhzm/bullet/compare/6.1.3...6.1.4)

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

Gemfile.lock

@@ -85,7 +85,7 @@ GEM
       autoprefixer-rails (>= 5.2.1)
       sassc (>= 2.0.0)
     builder (3.2.4)
-    bullet (6.1.3)
+    bullet (6.1.4)
       activesupport (>= 3.0.0)
       uniform_notifier (~> 1.11)
     byebug (11.1.3)
@@ -119,7 +119,7 @@ GEM
       activesupport (>= 4.2.0)
     highline (2.0.3)
     htmlentities (4.3.4)
-    i18n (1.8.7)
+    i18n (1.8.9)
       concurrent-ruby (~> 1.0)
     i18n-tasks (0.9.33)
       activesupport (>= 4.0.2)
@@ -160,7 +160,7 @@ GEM
     mimemagic (0.3.5)
     mini_mime (1.0.2)
     mini_portile2 (2.5.0)
-    minitest (5.14.3)
+    minitest (5.14.4)
     minitest-stub-const (0.6)
     mocha (1.12.0)
     mysql2 (0.5.3)
@@ -310,7 +310,7 @@ GEM
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
     unicode-display_width (1.7.0)
-    uniform_notifier (1.13.2)
+    uniform_notifier (1.14.1)
     websocket-driver (0.7.3)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)