Drop Ruby 2.3 from Travis and GitHub actions, JRuby 9.1

Author: picandocodigo

.github/workflows/6.x.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ 2.3, 2.4, 2.5, 2.6, 2.7 ]
+        ruby: [ 2.4, 2.5, 2.6, 2.7 ]
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
@@ -31,7 +31,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [ jruby-9.1, jruby-9.2 ]
+        ruby: [ jruby-9.2 ]
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2

.travis.yml

@@ -25,10 +25,6 @@ matrix:
       jdk: oraclejdk8
       env: QUIET=y TEST_SUITE=integration
 
-    - rvm: 2.3
-      jdk: oraclejdk8
-      env: QUIET=y TEST_SUITE=integration
-
     - rvm: 2.4
       jdk: oraclejdk8
       env: QUIET=y TEST_SUITE=integration