Drop older rubies from CI

Author: pirj

ci/.github/workflows/ci.yml

@@ -21,8 +21,6 @@ jobs:
           - 2.5
           - 2.4
           - 2.3
-          - 2.2
-          - 2.1.9
           - ruby-head
       fail-fast: false
     continue-on-error: ${{ matrix.ruby == 'jruby-9.2.13.0' || endsWith(matrix.ruby, 'head') }}
@@ -49,8 +47,6 @@ jobs:
           - 2.5
           - 2.4
           - 2.3
-          - 2.2
-          - 2.1.9
       fail-fast: false
     steps:
       - uses: actions/checkout@v2

ci/.travis.yml

@@ -12,21 +12,13 @@ before_install:
 bundler_args: "--binstubs --standalone --without documentation --path ../bundle"
 script: "script/run_build"
 rvm:
-  - 1.8.7
-  - 1.9.2
-  - 1.9.3
-  - 2.0.0
-  - ree
   - rbx-3
   - jruby-9.1.7.0 # pin JRuby to this until travis/rvm can install later versions
   - jruby-head
-  - jruby-1.7
 env:
   - JRUBY_OPTS='--dev'
 matrix:
   include:
-    - rvm: jruby-1.7
-      env: JRUBY_OPTS='--dev --1.8'
     - rvm: 2.7.1
       env: DIFF_LCS_VERSION="~> 1.3.0"
     - rvm: 2.7.1