Bump listen from 3.5.1 to 3.7.1

Bumps [listen](https://github.com/guard/listen) from 3.5.1 to 3.7.1.
- [Release notes](https://github.com/guard/listen/releases)
- [Commits](guard/listen@v3.5.1...v3.7.1)

---
updated-dependencies:
- dependency-name: listen
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Diff for: Gemfile

@@ -12,7 +12,7 @@ group(:build_site) do
   gem 'kramdown', '~> 2.3'
   gem 'vlad', '~> 2.7'
   gem 'vlad-git', '~> 2.1'
-  gem 'listen', '~> 3.5.1' # Preserve ability to run on Ruby 2.0, since listen 3.1 requires Ruby ~> 2.2.
+  gem 'listen', '~> 3.7.1' # Preserve ability to run on Ruby 2.0, since listen 3.1 requires Ruby ~> 2.2.
 end
 
 group(:generate_references) do

Diff for: Gemfile.lock

@@ -67,7 +67,7 @@ GEM
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
     liquid (4.0.3)
-    listen (3.5.1)
+    listen (3.7.1)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     locale (2.1.3)
@@ -170,7 +170,7 @@ DEPENDENCIES
   jekyll (~> 4.1)
   json (~> 2.5)
   kramdown (~> 2.3)
-  listen (~> 3.5.1)
+  listen (~> 3.7.1)
   maruku (~> 0.7)
   nokogiri (>= 1.12.5)
   pandoc-ruby