update gemfile

Gemfile

@@ -1,13 +1,13 @@
 source "https://rubygems.org"
 
-gem "jekyll", "~> 3.5.1"
+gem "jekyll", "~> 3.5"
 
-gem "jekyll-default-layout", "~> 0.1.4"
-gem "jekyll-feed", "~> 0.9.2"
-gem "jekyll-optional-front-matter", "~> 0.2.0"
-gem "jekyll-paginate", "~> 1.1.0"
-gem "jekyll-redirect-from", "~> 0.12.1"
-gem "jekyll-relative-links", "~> 0.4.1"
-gem "jekyll-sitemap", "~> 1.0.0"
+gem "jekyll-default-layout", "~> 0.1"
+gem "jekyll-feed", "~> 0.9"
+gem "jekyll-optional-front-matter", "~> 0.2"
+gem "jekyll-paginate", "~> 1.1"
+gem "jekyll-redirect-from", "~> 0.12"
+gem "jekyll-relative-links", "~> 0.4"
+gem "jekyll-sitemap", "~> 1.0"
 
-gem "classifier-reborn"
+gem "classifier-reborn", "~> 2.1"

Gemfile.lock

@@ -33,7 +33,7 @@ GEM
       jekyll (~> 3.3)
     jekyll-sass-converter (1.5.0)
       sass (~> 3.4)
-    jekyll-sitemap (1.0.0)
+    jekyll-sitemap (1.1.1)
       jekyll (~> 3.3)
     jekyll-watch (1.5.0)
       listen (~> 3.0, < 3.1)
@@ -61,15 +61,15 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  classifier-reborn
-  jekyll (~> 3.5.1)
-  jekyll-default-layout (~> 0.1.4)
-  jekyll-feed (~> 0.9.2)
-  jekyll-optional-front-matter (~> 0.2.0)
-  jekyll-paginate (~> 1.1.0)
-  jekyll-redirect-from (~> 0.12.1)
-  jekyll-relative-links (~> 0.4.1)
-  jekyll-sitemap (~> 1.0.0)
+  classifier-reborn (~> 2.1)
+  jekyll (~> 3.5)
+  jekyll-default-layout (~> 0.1)
+  jekyll-feed (~> 0.9)
+  jekyll-optional-front-matter (~> 0.2)
+  jekyll-paginate (~> 1.1)
+  jekyll-redirect-from (~> 0.12)
+  jekyll-relative-links (~> 0.4)
+  jekyll-sitemap (~> 1.0)
 
 BUNDLED WITH
    1.15.3