Automatically deploy snapshots to central (attempt 2)

Author: jozic

.github/workflows/snapshot.yml

@@ -19,8 +19,12 @@ jobs:
           server-id: central
           server-username: SONATYPE_USERNAME
           server-password: SONATYPE_PASSWORD
+          gpg-private-key: GPG_PRIVATE_KEY
+          gpg-passphrase: GPG_PASSPHRASE
       - name: Deploy snapshot
-        run: mvn clean deploy -P release
+        run: mvn -ntp clean deploy -P release
         env:
           SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
-          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
+          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
+          GPG_PRIVATE_KEY: ${{ secrets.GPG_PRIVATE_KEY }}
+          GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}