Handle "£" (GBP symbol) in queries.

Currently helpers do not handle "£" in queries and crash out.

• Update helpers to ignore unsupported messages (see TEMPLATE for current work around using on_error handler).
• Update helpers to support "£" in queries.
  • Figure out how to safely encode "£" in json (if that's possible).
  • Might need a custom parser for json.
  • Alternatively allow switching to another packet format that supports sending & receiving "£".