actions: use npm install instead of npm ci

it tries to install deps that don't match the platform:
npm/cli#558
https://github.com/wixplosives/test-drive/runs/426433972#step:4:5

.github/workflows/tests.yml

@@ -16,5 +16,5 @@ jobs:
       uses: actions/setup-node@v1
       with:
         node_version: ${{ matrix.node_version }}
-    - run: npm ci
+    - run: npm install
     - run: npm test