build(Dhis2Verifier): Install dependencies before package

This may solve the problem of building the world; because it should
install all dependencies into a local cache folder. There's where
`package` would build from.

.github/workflows/publish-dhis2-verifier.yml

@@ -26,8 +26,7 @@ jobs:
         run: |
           mvn versions:set -DnewVersion=${{ github.ref_name }}
       - name: Build with Maven
-        working-directory: .
-        run: mvn -B package --file pom.xml -DskipTests=true
+        run: mvn -B install package --file pom.xml -DskipTests=true
       - name: Create a release with the artefacts  # Note: this would create a new release…
         uses: ncipollo/[email protected]
         with: