v0.2.0

Added

• low_latency (Pacer option, C FhPacerOptions.low_latency, JavaScript lowLatency): for games, the presentation
  delay is what the next in-between needs, (1 - 1/N) of a source interval plus the measured pair, frame and present
  cost and the arrival jitter, instead of the video default with its 60 ms floor. A 60 fps stream to a 240 Hz display:
  a source frame reaches the screen 18 ms after its arrival instead of 61, without drops in Auto (heavy network jitter
  22 ms, a slow GPU 23 ms, 30 fps sources 31 ms). Off by default; video keeps its behaviour.
• Trace replays report how long source frames take from arrival to the screen, and can charge GPU time per pair and
  per generated frame (flyhigh-dev replay --pair-ms --mid-ms), so a shorter delay that the work does not fit shows
  as late frames.

Changed

• FhPacerOptions grew a field at its end (low_latency): C hosts rebuild against the new header.