v6.0.4

Fixed

• Generate query strings like a=val1,val2 instead a=val1&a=val2. Amazon often requires, and always accepts (as far as I can tell) comma-separated query string arrays, but often rejects the more standard format we were using before.
• Look up cached access tokens and RDTs using refresh tokens as the key, not LWA client ID, because it's possible to have multiple refresh tokens for the same client ID.

Changed

• Add JSON_UNESCAPED_SLASHES flag when outputting customized schema files in SchemaVersion