[build] Replace depracated publish target with GitHub Packages

Author: dzajkowski

.github/workflows/ci.yaml

@@ -14,11 +14,11 @@ jobs:
   build:
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
-      - uses: coursier/cache-action@v5
-      - uses: coursier/setup-action@v1.1.2
+      - uses: actions/checkout@v3
+      - uses: coursier/cache-action@v6
+      - uses: coursier/setup-action@v1.3.0
         with:
-          jvm: adopt:11
+          jvm: zulu:17
       - name: Check format
         run: ./millw __.checkFormat
       - name: Compile all
@@ -29,20 +29,18 @@ jobs:
         run: ./millw __.test
 
       - name: Setup GPG secrets for publish
-        if: github.event_name != 'pull_request' && github.event_name == 'push' && ((startsWith(github.ref, 'refs/tags/')) || github.ref == 'refs/heads/main')
         run: |
           gpg --version
           cat <(echo "${{ secrets.GPG_SECRET_KEY }}") | base64 --decode | gpg --batch --import
 
-      - name: Publish to Nexus Repository
+      - name: Publish to Github packages
         if: github.event_name != 'pull_request' && github.event_name == 'push' && ((startsWith(github.ref, 'refs/tags/')) || github.ref == 'refs/heads/main')
         run: |
           ./millw mill.scalalib.PublishModule/publishAll \
             __.publishArtifacts \
-            --sonatypeCreds '${{ secrets.SONATYPE_CREDS }}' \
+            --sonatypeCreds '${{ github.repository_owner }}:${{ secrets.GITHUB_TOKEN }}' \
             --stagingRelease false \
-            --sonatypeUri "https://nexus.iog.solutions/repository/maven-release/" \
-            --sonatypeSnapshotUri "https://nexus.iog.solutions/repository/maven-snapshot/" \
+            --sonatypeUri "https://maven.pkg.github.com/${{ github.repository }}" \
             --gpgArgs --batch,--yes,-a,-b
 
   publish-notes: