CI: Travis maintenance: add JRuby 9.2; fix JRuby 9.1 build; configure…

… Rubinius (savonrb#921)

* CI: Extend matrix w/ JRuby 9.2

* CI: run Rubinius in trusty

* CI: JRuby 9.2 JAVA_OPTS with --add-opens decls

See jruby/jruby#4834

* CI: Use "name" to identify specific matrix jobs

* CI: Drop unmaintained Ruby versions

  - see https://www.ruby-lang.org/en/downloads/branches/

.travis.yml

@@ -1,18 +1,28 @@
 # https://github.com/travis-ci/travis-ci/wiki/.travis.yml-options
 language: "ruby"
-sudo: false
+
 before_install:
   - gem install bundler
 script: "bundle exec rake --trace"
+
 rvm:
-  - 2.3.0
-  - 2.4.1
-  - 2.5.3
-  - jruby-9.1.15.0
-  - rbx-2
+  - "2.5"
+  - "2.6"
+  - "2.7"
+
 matrix:
+  include:
+    - name: "JRuby 9.2"
+      rvm: jruby-9.2.11.1
+      jdk: openjdk11
+      env: JAVA_OPTS="--add-opens java.base/java.security.cert=ALL-UNNAMED --add-opens java.base/java.security=ALL-UNNAMED"
+    - name: Rubinius
+      rvm: rbx-4
+      dist: trusty
   allow_failures:
-    - rvm: rbx-2
+    - name: Rubinius
+    - name: "JRuby 9.2"
   fast_finish: true
+
 notifications:
   irc: "irc.freenode.org#savon"