v0.4.0

• Upgrade the dependency for elasticsearch client library from 7.17 to 8.12. It now depends on the low level transport library instead of the high level client library. (#200)
• Hatch as the project management tool (#205)
• Pipe output to external command (#203)
• New commands to download extension file (#207), show context variables
• Show request duration in output header (#182)
• Fix smart connection for changing password (#196)
• Load pre-defined variables (#211)
• Better support for ad-hoc output file (#204)
• Support path_prefix for proxy'd elasticsearch instances (#206)
• Other misc fixes and improvements