Update ESLint documentation (4.15.0)

Author: Thibaut

lib/docs/filters/eslint/entries.rb

@@ -12,10 +12,12 @@ def get_name
       end
 
       def get_type
-        if subpath.include?('guide')
-          type = 'Guide'
+        if subpath.include?('developer-guide')
+          'Developer Guide'
+        elsif subpath.include?('guide')
+          'Guide'
         elsif subpath.start_with?('rules')
-          type = 'Rules'
+          'Rules'
         end
       end
     end

lib/docs/scrapers/eslint.rb

@@ -2,7 +2,7 @@ module Docs
   class Eslint < UrlScraper
     self.name = 'ESLint'
     self.type = 'simple'
-    self.release = '4.12.0'
+    self.release = '4.15.0'
     self.base_url = 'https://eslint.org/docs/'
     self.root_path = 'user-guide/getting-started'
     self.links = {
@@ -12,7 +12,7 @@ class Eslint < UrlScraper
 
     html_filters.push 'eslint/entries', 'eslint/clean_html'
 
-    options[:skip_patterns] = [/developer-guide/, /maintainer-guide/]
+    options[:skip_patterns] = [/maintainer-guide/]
     options[:skip] = %w(about about/ rules)
 
     options[:attribution] = <<-HTML