Replace Travis-CI with GHA.

Signed-off-by: dblock <dblock@dblock.org>

.github/workflows/danger.yml

@@ -0,0 +1,18 @@
+---
+name: danger
+on: [pull_request]
+jobs:
+  danger:
+    runs-on: ubuntu-20.04
+    steps:
+    - uses: actions/checkout@v1
+    - name: Set up Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 2.6
+        bundler-cache: true
+    - name: Run Danger
+      run: |
+        # the personal token is public, this is ok, base64 encode to avoid tripping Github
+        TOKEN=$(echo -n NWY1ZmM5MzEyMzNlYWY4OTZiOGU3MmI3MWQ3Mzk0MzgxMWE4OGVmYwo= | base64 --decode)
+        DANGER_GITHUB_API_TOKEN=$TOKEN bundle exec danger --verbose

.github/workflows/rubocop.yml

@@ -0,0 +1,16 @@
+---
+name: test
+on: [push, pull_request]
+jobs:
+  lint:
+    name: RuboCop
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: 2.7
+          bundler-cache: true
+      - name: Run RuboCop
+        run: bundle exec rubocop

.github/workflows/test-mongodb.yml

@@ -0,0 +1,32 @@
+---
+name: test
+on: [push, pull_request]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        entry:
+          - { ruby: 2.6.2, mongoid: 6.4.8, mongodb: 4.4 }
+          - { ruby: 2.6.2, mongoid: 7.2.3, mongodb: 4.4 }
+          - { ruby: 2.6.2, mongoid: 7.3.0, mongodb: 4.4 }
+    name: test (ruby=${{ matrix.entry.ruby }}, mongoid=${{ matrix.entry.mongoid }}, mongodb=${{ matrix.entry.mongodb }})
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.entry.ruby }}
+      - uses: browser-actions/setup-geckodriver@latest
+      - run: geckodriver --version
+      - uses: supercharge/mongodb-github-action@1.7.0
+        with:
+          mongodb-version: ${{ matrix.entry.mongodb }}
+      - name: Test
+        uses: GabrielBB/xvfb-action@v1
+        env:
+          DATABASE_ADAPTER: mongoid
+          MONGOID_VERSION: ${{ matrix.entry.mongoid }}
+        with:
+          run: |
+            bundle install
+            bundle exec rake spec

.github/workflows/test-postgresql.yml

@@ -0,0 +1,33 @@
+---
+name: test
+on: [push, pull_request]
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        entry:
+          - { ruby: 2.6.2, postgresql: 11 }
+    name: test (ruby=${{ matrix.entry.ruby }}, postgresql=${{ matrix.entry.postgresql }})
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.entry.ruby }}
+      - uses: browser-actions/setup-geckodriver@latest
+      - run: geckodriver --version
+      - uses: harmon758/postgresql-action@v1
+        with:
+          postgresql version: ${{ matrix.entry.postgresql }}
+          postgresql db: slack_ruby_bot_server_test
+          postgresql user: test
+          postgresql password: password
+      - name: Test
+        uses: GabrielBB/xvfb-action@v1
+        env:
+          DATABASE_ADAPTER: activerecord
+          DATABASE_URL: postgres://test:password@localhost/slack_ruby_bot_server_test
+        with:
+          run: |
+            bundle install
+            bundle exec rake spec

spec/database_adapters/activerecord/config/postgresql.yml

@@ -10,6 +10,7 @@ development:
 
 test:
   <<: *default
+  url: <%= ENV["DATABASE_URL"] %>
   database: slack_ruby_bot_server_test
 
 production: