Update version and filter

lib/docs/filters/homebrew/clean_html.rb

@@ -4,6 +4,11 @@ module Docs
       def call
         css('hr')
 
+        if at_css('h1').nil?
+          title = current_url.normalized_path[1..-1].gsub(/-/, ' ')
+          doc.children.before("<h1>#{title}</h1>")
+        end
+
         css('div.highlighter-rouge').each do |node|
           lang = node['class'][/language-(\w+)/, 1]
           node['data-language'] = lang if lang

lib/docs/filters/homebrew/entries.rb

@@ -2,7 +2,8 @@ module Docs
   class Homebrew
     class EntriesFilter < Docs::EntriesFilter
       def get_name
-        name = at_css('h1').content.strip
+        header = at_css('h1')
+        name = header.nil? ? current_url.normalized_path[1..-1].gsub(/-/, ' ') : header.content.strip
         name.remove! %r{\(.*}
         name
       end
@@ -16,6 +17,7 @@ module Docs
         Python-for-Formula-Authors
         Migrating-A-Formula-To-A-Tap
         Rename-A-Formula
+        Building-Against-Non-Homebrew-Dependencies
         How-to-Create-and-Maintain-a-Tap
         Brew-Test-Bot
         Prose-Style-Guidelines)

lib/docs/scrapers/homebrew.rb

@@ -2,7 +2,7 @@ module Docs
   class Homebrew < UrlScraper
     self.name = 'Homebrew'
     self.type = 'simple'
-    self.release = '2.0.1'
+    self.release = '2.1.9'
     self.base_url = 'https://docs.brew.sh/'
     self.links = {
       home: 'https://brew.sh',