Merge with upstream activemerchant master

Author: jeffschuil

.github/workflows/ruby-ci.yml

@@ -0,0 +1,44 @@
+name: CI
+
+on:
+  pull_request:
+    branches:
+      - '**'
+  push:
+    branches:
+      - master
+
+jobs:
+  build:
+    name: Ruby ${{ matrix.version }} ${{ matrix.gemfile }}
+    runs-on: ubuntu-latest
+    env:
+      BUNDLE_GEMFILE: ${{ matrix.gemfile }}
+    strategy:
+      matrix:
+        version:
+          - 3.1
+        gemfile:
+          - gemfiles/Gemfile.rails50
+          - gemfiles/Gemfile.rails51
+          - gemfiles/Gemfile.rails52
+          - gemfiles/Gemfile.rails60
+          - gemfiles/Gemfile.rails_master
+        exclude:
+          - version: 2.6
+            gemfile: gemfiles/Gemfile.rails_master
+          - version: 2.5
+            gemfile: gemfiles/Gemfile.rails_master
+    steps:
+      - uses: actions/checkout@v2
+      
+      - name: Set up Ruby ${{ matrix.version }}
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.version }}
+          bundler-cache: true
+
+      - name: Test
+        run: bundle exec rake test
+      - name: Linter
+        run: bundle exec rubocop

.github/workflows/stale.yml

@@ -0,0 +1,19 @@
+name: 'Close stale issues and PRs'
+on:
+  schedule:
+    - cron: '30 1 * * *'
+
+permissions:
+  issues: write
+  pull-requests: write
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v8
+        with:
+          stale-issue-message: 'To provide a cleaner slate for the maintenance of the library, this PR/Issue is being labeled stale after 60 days without activity. It will be closed in 14 days unless you comment with an update regarding its applicability to the current build. Thank you!'
+          stale-pr-message: 'To provide a cleaner slate for the maintenance of the library, this PR/Issue is being labeled stale after 60 days without activity. It will be closed in 14 days unless you comment with an update regarding its applicability to the current build. Thank you!'
+          days-before-close: 14
+          exempt-draft-pr: true