Suppress deprecation warnings by OpenSSL 3

Author: nobu

ext/openssl/extconf.rb

@@ -25,6 +25,7 @@
 if with_config("debug") or enable_config("debug")
   $defs.push("-DOSSL_DEBUG")
 end
+$defs.push("-D""OPENSSL_SUPPRESS_DEPRECATED")
 
 have_func("rb_io_maybe_wait") # Ruby 3.1