Bump bullet from 5.7.6 to 5.8.1 (forem#1063) [ci skip]

Bumps [bullet](https://github.com/flyerhzm/bullet) from 5.7.6 to 5.8.1.
- [Release notes](https://github.com/flyerhzm/bullet/releases)
- [Changelog](https://github.com/flyerhzm/bullet/blob/master/CHANGELOG.md)
- [Commits](flyerhzm/bullet@5.7.6...5.8.1)

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

Gemfile

@@ -101,7 +101,7 @@ group :development do
   gem "better_errors", "~> 2.5"
   gem "binding_of_caller", "~> 0.8"
   gem "brakeman", "~> 4.3", require: false
-  gem "bullet", "~> 5.7"
+  gem "bullet", "~> 5.8"
   gem "bundler-audit", "~> 0.6"
   gem "derailed_benchmarks", "~> 1.3"
   gem "guard", "~> 2.14", require: false

Gemfile.lock

@@ -162,9 +162,9 @@ GEM
     brakeman (4.3.1)
     buftok (0.2.0)
     builder (3.2.3)
-    bullet (5.7.6)
+    bullet (5.8.1)
       activesupport (>= 3.0.0)
-      uniform_notifier (~> 1.11.0)
+      uniform_notifier (~> 1.11)
     bundler-audit (0.6.0)
       bundler (~> 1.2)
       thor (~> 0.18)
@@ -867,7 +867,7 @@ GEM
       unf_ext
     unf_ext (0.0.7.5)
     unicode-display_width (1.4.0)
-    uniform_notifier (1.11.0)
+    uniform_notifier (1.12.1)
     validate_url (1.0.2)
       activemodel (>= 3.0.0)
       addressable
@@ -927,7 +927,7 @@ DEPENDENCIES
   bourbon (~> 1.4)
   brakeman (~> 4.3)
   buffer!
-  bullet (~> 5.7)
+  bullet (~> 5.8)
   bundler-audit (~> 0.6)
   capybara (~> 3.10)
   carrierwave (~> 1.2)