rbenv/ruby-build v20200722

ruby-build 20200722

on GitHub

Fix a bash 4.4 warning when installing jruby

In particular, the following:

/path/to/bin/ruby-build: line 739: warning: command substitution: ignored null byte in input

add mruby 2.1.1

Added rbx-4.16 to 5.0

compatible with macOS 11

Add definition for JRuby 9.2.12.0

https://www.jruby.org/2020/07/01/jruby-9-2-12-0.html

Add support for installing GraalVM

• Supports using other GraalVM languages such as JavaScript, Python, R and Java.
• Supports running TruffleRuby on JVM and not only Native.
• Add GraalVM 20.1.0.

Rename definition to truffleruby+graalvm

• '+' needs to be considered part of the name for --definitions and -l
  to see truffleruby and truffleruby+graalvm as separate.