Fix linting errors

Author: Strift

functions/src/import/index.ts

@@ -16,7 +16,7 @@
  * limitations under the License.
  */
 
-import * as admin from 'firebase-admin'
+import { initializeApp, credential, firestore } from 'firebase-admin'
 import { DocumentSnapshot } from 'firebase-functions/lib/v1/providers/firestore'
 import { CLIConfig, parseConfig } from './config'
 import * as logs from '../logs'
@@ -29,12 +29,12 @@ const run = async () => {
   const config: CLIConfig = await parseConfig()
 
   // Initialize Firebase using the Google Credentials in the GOOGLE_APPLICATION_CREDENTIALS environment variable.
-  admin.initializeApp({
-    credential: admin.credential.applicationDefault(),
+  initializeApp({
+    credential: credential.applicationDefault(),
     databaseURL: `https://${config.projectId}.firebaseio.com`,
   })
 
-  const database = admin.firestore()
+  const database = firestore()
 
   // Initialize Meilisearch index.
   const index = initMeilisearchIndex(config.meilisearch)