Update scss_lint to v0.48.0.

Gemfile

@@ -4,5 +4,5 @@ group :development, :test do
   gem 'jekyll', '~> 3.1.2'
   gem 'jekyll-redirect-from', '~> 0.10.0'
   gem 'jekyll-sitemap', '~> 0.10.0'
-  gem 'scss_lint', '~> 0.47.1'
+  gem 'scss_lint', '~> 0.48.0'
 end

Gemfile.lock

@@ -26,15 +26,15 @@ GEM
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
     mercenary (0.3.6)
-    rake (10.5.0)
+    rake (11.2.2)
     rb-fsevent (0.9.7)
     rb-inotify (0.9.7)
       ffi (>= 0.5.0)
-    rouge (1.10.1)
+    rouge (1.11.1)
     safe_yaml (1.0.4)
     sass (3.4.22)
-    scss_lint (0.47.1)
-      rake (>= 0.9, < 11)
+    scss_lint (0.48.0)
+      rake (>= 0.9, < 12)
       sass (~> 3.4.15)
 
 PLATFORMS
@@ -45,7 +45,7 @@ DEPENDENCIES
   jekyll (~> 3.1.2)
   jekyll-redirect-from (~> 0.10.0)
   jekyll-sitemap (~> 0.10.0)
-  scss_lint (~> 0.47.1)
+  scss_lint (~> 0.48.0)
 
 BUNDLED WITH
    1.12.5