Fix tests on JRuby

Author: sferik

lib/simplecov/load_global_config.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 require "etc"
-home_dir = (Dir.home && File.expand_path("~")) || Etc.getpwuid.dir || (ENV.fetch("USER", nil) && File.expand_path("~#{ENV.fetch('USER', nil)}"))
+home_dir = Dir.home || File.expand_path("~") || Etc.getpwuid.dir || (ENV.fetch("USER", nil) && File.expand_path("~#{ENV.fetch('USER', nil)}"))
 if home_dir
   global_config_path = File.join(home_dir, ".simplecov")
   load global_config_path if File.exist?(global_config_path)