v0.17.0

Fixes

• Fix failing tests regarding --help (#207)
  (by @fantix in 956a2ca for #207)

• Fix confusing error when no arguments are passed to a query with named params (#208)
  (by @elprans in 8e0b334 for #208)

• Add Python 3.10 compatibility (#209)
  (by @elprans in 3472f17 for #209)

• Fix asyncio SSL unclosed warning (#210)
  (by @fantix in d718839 for #210)

• More reliable transport double-closing
  (by @fantix in 337b779)

• Rename query_one to query_single
  (by @fmoor in f6900b0)