upload build snapshot to github actions

.github/workflows/build.yml

@@ -58,3 +58,9 @@ jobs:
       # Run IntelliJ Plugin Verifier action using GitHub Action
       - name: Verify Plugin
         run: ./gradlew runPluginVerifier -Pplugin.verifier.home.dir=${{ steps.properties.outputs.pluginVerifierHomeDir }}
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v1
+        with:
+          name: plugin-artifact
+          path: ./build/distributions/