Enhance GitHub actions (#22)

* ⬆️ :: Update dev dependencies

* 🐛 :: Use correct badge url for CI status

* ♻️ :: Refactor CI action

* ♻️ :: Refactor action file

* ♻️ :: Rename workflow

* 🚚 :: Rename action file according action name

* ♻️ :: Update docs

.github/workflows/continuous-integration.yml

@@ -1,14 +1,32 @@
 #
-# github-actions.yml
+# continuous-integration.yml
 # Created by Felix Mau (https://felix.hamburg)
 #
+# Based on:
+#  - https://docs.github.com/en/actions/quickstart
+#  - https://futurestud.io/tutorials/github-actions-trigger-builds-on-schedule-cron#schedulegithubactionsusingacron
+#  - https://about.codecov.io/blog/code-coverage-for-ios-development-using-swift-xcode-and-github-actions/
+#
 
 name: Continuous Integration
-on: [push, pull_request]
+on:  
+  push:
+  pull_request:
+  schedule:
+    # Run workflow every day at midnight.
+    #
+    #  - Note: "Scheduled workflows run on the latest commit on the default or base branch."
+    #          https://docs.github.com/en/actions/reference/events-that-trigger-workflows#scheduled-events
+    - cron: '0 0 * * *' 
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel.
 jobs:
+  # This workflow starts with a job called "build-and-test".
   build-and-test:
+    name: Build & Test
     runs-on: macos-latest
 
+    # Steps represent a sequence of tasks that will be executed as part of the job.
     steps:
       - run: echo "🎉 The job was automatically triggered by a ${{ github.event_name }} event."
       - run: echo "🐧 This job is now running on a ${{ runner.os }} server hosted by GitHub!"
@@ -16,32 +34,31 @@ jobs:
 
       - name: Check out repository code
         uses: actions/checkout@v2
+
       - run: echo "💡 The ${{ github.repository }} repository has been cloned to the runner."
       - run: echo "🖥️ The workflow is now ready to test your code on the runner."
 
       - name: Install dependencies
         working-directory: ./Example
-        run: |
-          bundle install
+        run: bundle install
 
       - name: Execute SwiftFormat and treat any formatting errors as real errors.
         working-directory: ./Example
-        run: |
-          bundle exec fastlane format
+        run: bundle exec fastlane format
 
       - name: Execute SwiftLint and treat any formatting errors as real errors.
         working-directory: ./Example
-        run: |
-          bundle exec fastlane format
+        run: bundle exec fastlane format
 
       - name: Execute tests.
         working-directory: ./Example
-        run: |
-          bundle exec fastlane tests
+        run: bundle exec fastlane tests
 
       - name: Execute validation of library.
         working-directory: ./Example
-        run: |
-          bundle exec fastlane pod_lint
+        run: bundle exec fastlane pod_lint
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v1.2.1
 
       - run: echo "🍏 This job's status is ${{ job.status }}."