codemagic.yaml: add GitHub release logic

requires monero-project#277

codemagic.yaml

@@ -1,6 +1,16 @@
 workflows:
   build:
     name: Build workflow
+    triggering:
+      events:
+        - tag
+      branch_patterns:
+        - pattern: '*'
+          include: true
+          source: true
+    environment:
+      groups:
+        - github
     scripts:
       - name: install dependencies
         script: HOMEBREW_NO_AUTO_UPDATE=1 brew install boost openssl zmq libpgm miniupnpc ldns expat libunwind-headers protobuf qt@5
@@ -40,3 +50,13 @@ workflows:
         script: |
           export ARTIFACT_NAME="aeon-gui-mac-armv8-$(git describe --tags)"
           curl --upload-file build/release/$ARTIFACT_NAME.tar.bz2 https://transfer.sh/$ARTIFACT_NAME.tar.bz2
+      - name: Publish to GitHub
+        script: |
+          #!/usr/bin/env zsh
+          # Publish only for tag builds
+          if [ -z ${CM_TAG} ]; then
+            echo "Not a tag build, will not publish GitHub release"
+            exit 0
+          fi
+          export ARTIFACT_NAME="aeon-gui-mac-armv8-$(git describe --tags)"
+          gh release create "${CM_TAG}" build/release/$ARTIFACT_NAME.tar.bz2