Livecheck: Pass regex into strategy blocks

Library/Homebrew/livecheck/strategy/git.rb

@@ -87,7 +87,7 @@ module Homebrew
           tags_only_debian = tags_data[:tags].all? { |tag| tag.start_with?("debian/") }
 
           if block
-            case (value = block.call(tags_data[:tags]))
+            case (value = block.call(tags_data[:tags], regex))
             when String
               match_data[:matches][value] = Version.new(value)
             when Array

Library/Homebrew/livecheck/strategy/header_match.rb

@@ -45,7 +45,7 @@ module Homebrew
           merged_headers = headers.reduce(&:merge)
 
           if block
-            match = block.call(merged_headers)
+            match = block.call(merged_headers, regex)
           else
             match = nil
 

Library/Homebrew/livecheck/strategy/page_match.rb

@@ -49,7 +49,7 @@ module Homebrew
         # @return [Array]
         def self.page_matches(content, regex, &block)
           if block
-            case (value = block.call(content))
+            case (value = block.call(content, regex))
             when String
               return [value]
             when Array