chore: add trailing-slash to firebase

Co-authored-by: Devin Dooley <dooleydevin@github.com>

Author: taronaeo

Node.gitignore

@@ -120,7 +120,7 @@ dist
 .dynamodb/
 
 # Firebase cache directory
-.firebase
+.firebase/
 
 # TernJS port file
 .tern-port