[INFO] --- exec-maven-plugin:1.6.0:exec (invoker-generator) @ jruby-openssl ---
Exception in thread "main" java.lang.UnsupportedClassVersionError: JRuby requires Java 7 or higher
       at org.jruby.RubyInstanceConfig.initGlobalJavaVersion(RubyInstanceConfig.java:1897)
       at org.jruby.RubyInstanceConfig.<clinit>(RubyInstanceConfig.java:1661)
       at org.jruby.internal.runtime.methods.InvocationMethodFactory.getAnnotatedMethodClass(InvocationMethodFactory.java:255)
       at org.jruby.anno.InvokerGenerator.main(InvokerGenerator.java:84)
[ERROR] Command execution failed.

Upstream version 0.9.21

# gpg: Signature made Sat 21 Oct 2017 04:05:17 PM IST
# gpg:                using RSA key 1247379C15BCF26C0EC46B61AFB8E0FC9231CC6D
# gpg: Good signature from "Miguel Landaeta <miguel@miguel.cc>" [full]
# gpg:                 aka "Miguel Landaeta <nomadium@gmail.com>" [full]
# gpg:                 aka "Miguel Landaeta (LDC) <miguel@ldc.usb.ve>" [full]
# gpg:                 aka "Miguel Landaeta (Debian) <nomadium@debian.org>" [full]
# Primary key fingerprint: 4CB7 FE1E 280E CC90 F29A  597E 6E60 8B63 7D89 67E9
#      Subkey fingerprint: 1247 379C 15BC F26C 0EC4  6B61 AFB8 E0FC 9231 CC6D

Debian release 0.9.20-1~exp1

# gpg: Signature made Sat 04 Mar 2017 10:27:23 AM GMT
# gpg:                using RSA key 0xAFB8E0FC9231CC6D
# gpg: Good signature from "Miguel Landaeta <miguel@miguel.cc>" [full]
# gpg:                 aka "Miguel Landaeta <nomadium@gmail.com>" [full]
# gpg:                 aka "Miguel Landaeta (LDC) <miguel@ldc.usb.ve>" [full]
# gpg:                 aka "Miguel Landaeta (Debian) <nomadium@debian.org>" [full]
# Primary key fingerprint: 4CB7 FE1E 280E CC90 F29A  597E 6E60 8B63 7D89 67E9
#      Subkey fingerprint: 1247 379C 15BC F26C 0EC4  6B61 AFB8 E0FC 9231 CC6D

Upstream version 0.9.20

# gpg: Signature made Sat 04 Mar 2017 09:15:36 AM GMT
# gpg:                using RSA key 0xAFB8E0FC9231CC6D
# gpg: Good signature from "Miguel Landaeta <miguel@miguel.cc>" [full]
# gpg:                 aka "Miguel Landaeta <nomadium@gmail.com>" [full]
# gpg:                 aka "Miguel Landaeta (LDC) <miguel@ldc.usb.ve>" [full]
# gpg:                 aka "Miguel Landaeta (Debian) <nomadium@debian.org>" [full]
# Primary key fingerprint: 4CB7 FE1E 280E CC90 F29A  597E 6E60 8B63 7D89 67E9
#      Subkey fingerprint: 1247 379C 15BC F26C 0EC4  6B61 AFB8 E0FC 9231 CC6D

Upstream release 0.9.11

# gpg: Signature made Sat 19 Sep 2015 12:02:38 PM ART using RSA key ID 8957CDA5
# gpg: Good signature from "Miguel Landaeta <miguel@miguel.cc>"
# gpg:                 aka "Miguel Landaeta <nomadium@gmail.com>"
# gpg:                 aka "Miguel Landaeta (LDC) <miguel@ldc.usb.ve>"
# gpg:                 aka "Miguel Landaeta (Debian) <nomadium@debian.org>"
# gpg:                 aka "Miguel Landaeta (Restorando) <miguel@restorando.com>"