Bump node version

Author: oeway

.github/workflows/build-site.yml

@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x]
+        node-version: ["13.14"]
 
     steps:
     - uses: actions/checkout@v2

package-lock.json

@@ -17,6 +17,7 @@
     "@tensorflow/tfjs-core": "^4.17.0",
     "axios": "^0.21.2",
     "buefy": "^0.8.0",
+    "ci": "^2.3.0",
     "core-js": "^3.6.5",
     "doi-regex": "^0.1.10",
     "dompurify": "^2.0.17",