Use simplecov-cobertura

.github/codecov.yml

@@ -1,5 +1,5 @@
 fixes:
-  - "/home/linuxbrew/.linuxbrew/Homebrew/::"
+  - "::Library/Homebrew/"
 coverage:
   round: nearest
   status:

Library/Homebrew/Gemfile

@@ -18,6 +18,7 @@ gem "rspec-wait", require: false
 gem "rubocop", require: false
 gem "rubocop-ast", require: false
 gem "simplecov", require: false
+gem 'simplecov-cobertura', require: false
 gem "sorbet", require: false
 gem "sorbet-runtime", require: false
 gem "tapioca", require: false

Library/Homebrew/test/spec_helper.rb

@@ -3,9 +3,12 @@
 
 if ENV["HOMEBREW_TESTS_COVERAGE"]
   require "simplecov"
-  require "simplecov_json_formatter"
+  require 'simplecov-cobertura'
 
-  formatters = [SimpleCov::Formatter::HTMLFormatter, SimpleCov::Formatter::JSONFormatter]
+  formatters = [
+    SimpleCov::Formatter::HTMLFormatter,
+    SimpleCov::Formatter::CoberturaFormater,
+  ]
   SimpleCov.formatters = SimpleCov::Formatter::MultiFormatter.new(formatters)
 
   if RUBY_PLATFORM[/darwin/] && ENV["TEST_ENV_NUMBER"]