ruby-build 20210405

Release ruby-build 20210405 · rbenv/ruby-build · GitHub

• Add JRuby 9.2.17.0 definition
• Use autoreconf -i instead of autoconf because autoconf-2.71+ is incompatible with 2.69 or before.
• Added 3.0.1, 2.7.3, 2.6.7, 2.5.9