upload LHCI results as artifacts

.github/workflows/ci.yml

@@ -27,7 +27,7 @@ jobs:
     - uses: actions/setup-node@v1
       with:
         node-version: 12.x
-    - name: Install utilities
+    - name: Install LHCI
       run: npm install -g @lhci/cli
     - name: Audit deploy preview
       if: github.event_name == 'pull_request'
@@ -51,3 +51,9 @@ jobs:
           --collect.url=https://jarv.is/notes/how-to-pull-request-fork-github/amp.html
       env:
         LHCI_GITHUB_APP_TOKEN: ${{ secrets.LHCI_GITHUB_APP_TOKEN }}
+    - name: Upload results as artifact
+      if: success()
+      uses: actions/upload-artifact@v1
+      with:
+        name: lhci-results
+        path: ./.lighthouseci