v7.2.0: SensorWorker — periodic a-f-G-E-S-E heartbeat with gpsd/stati…

Limit reported position precision to 4 decimal places

Round AIS lat/lon to a maximum of 4 decimal places (~11 m) when building
CoT events. Bump to 7.1.4.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

bump

async fix

fixes for py3.7

performance improvements

version bump

patch for screenshot in readme

minor version bump

added xml declaration to output xml