v12.1.1

🎯 Challenges

• a0feeb8: Rephrased White-/Blacklist into Allow-/Blocklist in all affected challenges, corresponding hints as well as in entire code base

🔒 Security

• #1471: Payments from wallets with insufficient funds for purchase are now rejected on client- and server-side (kudos to @grijul)
• #1498: Credit card numbers are now returned in masked form by the API instead of masking on the client (kudos to @PranjalAgni)

🎨 User Interface

• #1496: Slightly improved responsiveness of Score Board to have less off-screen elements and not hide columns prematurely