以前と同じ手順でアップグレード。

今回も下記エラーがでました。
=====================================================================
FAILED TEST SUMMARY
———————————————————————
Bug #16069 (ICONV transliteration failure) [ext/iconv/tests/bug16069.phpt]
iconv stream filter [ext/iconv/tests/iconv_stream_filter.phpt]
Bug #39322 (proc_terminate() loosing process resource) [ext/standard/tests/general_functions/bug39322.phpt]
proc_open [ext/standard/tests/general_functions/proc_open02.phpt]
=====================================================================

まぁ〜今回も問題なさそうなので放置：-)