Bump jekyll-feed from 0.15.0 to 0.15.1

Bumps [jekyll-feed](https://github.com/jekyll/jekyll-feed) from 0.15.0 to 0.15.1.
- [Release notes](https://github.com/jekyll/jekyll-feed/releases)
- [Changelog](https://github.com/jekyll/jekyll-feed/blob/master/History.markdown)
- [Commits](https://github.com/jekyll/jekyll-feed/compare/v0.15.0...v0.15.1)

Gemfile

@@ -6,7 +6,7 @@ gem 'jekyll', '~> 4.1.1'
 gem 'jekyll-paginate', '~> 1.1.0'
 gem 'rouge', '~> 3.23.0'
 gem 'jekyll-redirect-from', '~> 0.16.0'
-gem 'jekyll-feed', '~> 0.15.0'
+gem 'jekyll-feed', '~> 0.15.1'
 gem "jekyll-sitemap", "~> 1.4"
 
 group :test do

Gemfile.lock

@@ -5,7 +5,7 @@ GEM
       public_suffix (>= 2.0.2, < 5.0)
     colorator (1.1.0)
     concurrent-ruby (1.1.7)
-    em-websocket (0.5.1)
+    em-websocket (0.5.2)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
     ethon (0.12.0)
@@ -39,7 +39,7 @@ GEM
       rouge (~> 3.0)
       safe_yaml (~> 1.0)
       terminal-table (~> 1.8)
-    jekyll-feed (0.15.0)
+    jekyll-feed (0.15.1)
       jekyll (>= 3.7, < 5.0)
     jekyll-paginate (1.1.0)
     jekyll-redirect-from (0.16.0)
@@ -91,7 +91,7 @@ PLATFORMS
 DEPENDENCIES
   html-proofer (~> 3.16.0)
   jekyll (~> 4.1.1)
-  jekyll-feed (~> 0.15.0)
+  jekyll-feed (~> 0.15.1)
   jekyll-paginate (~> 1.1.0)
   jekyll-redirect-from (~> 0.16.0)
   jekyll-sitemap (~> 1.4)