Bump scss_lint from 0.56.0 to 0.57.0

Bumps [scss_lint](https://github.com/brigade/scss-lint) from 0.56.0 to 0.57.0.
- [Release notes](https://github.com/brigade/scss-lint/releases)
- [Changelog](https://github.com/brigade/scss-lint/blob/master/CHANGELOG.md)
- [Commits](sds/scss-lint@v0.56.0...v0.57.0)

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

Author: dependabot-support

Gemfile.lock

@@ -9,7 +9,7 @@ GEM
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
     eventmachine (1.2.5)
-    ffi (1.9.18)
+    ffi (1.9.23)
     forwardable-extended (2.6.0)
     http_parser.rb (0.6.0)
     i18n (0.9.3)
@@ -41,21 +41,21 @@ GEM
     pathutil (0.16.1)
       forwardable-extended (~> 2.6)
     public_suffix (3.0.1)
-    rake (12.3.0)
-    rb-fsevent (0.10.2)
+    rake (12.3.1)
+    rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
     rouge (3.1.0)
     ruby_dep (1.5.0)
     safe_yaml (1.0.4)
-    sass (3.5.5)
+    sass (3.5.6)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    scss_lint (0.56.0)
+    scss_lint (0.57.0)
       rake (>= 0.9, < 13)
-      sass (~> 3.5.3)
+      sass (~> 3.5.5)
 
 PLATFORMS
   ruby