test_cgi_cookie_new_with_domain does not run in 2.6 or earlier

The test added in 107a0c67f922044dc78e2fde94f991206267a6a0 contains a test that uses `*h to merge two string hashes. This does not work under Ruby 2.6 and earlier, making it impossible to test v0.1.0.2 on any Ruby 2.6-compatible implementation.

Error: test_cgi_cookie_new_with_domain(CGICookieTest): TypeError: hash key "name" is not a Symbol
/home/enebo/work/gems/cgi/test/cgi/test_cgi_cookie.rb:65:in `test_cgi_cookie_new_with_domain'
     62: 
     63:   def test_cgi_cookie_new_with_domain
     64:     h = {'name'=>'name1', 'value'=>'value1'}
  => 65:     cookie = CGI::Cookie.new('domain'=>'a.example.com', **h)
     66:     assert_equal('a.example.com', cookie.domain)
     67: 
     68:     cookie = CGI::Cookie.new('domain'=>'1.example.com', **h)

Inizia in test/cgi/test_cgi_cookie.rb, in corrispondenza di test_cgi_cookie_new_with_domain, e rivedi la chiamata mostrata nell’errore con Ruby 2.6 e versioni precedenti. Esegui questo test con un’implementazione compatibile con Ruby 2.6 e verifica che venga eseguito e superato per entrambi i domini di esempio.