v0.2.1

• Fixed: a wrong key, a wrong server address or a refused report now writes a
  [Quiet Guard] line to the PHP error log, which is wp-content/debug.log
  where WP_DEBUG_LOG is on. Until now every one of those failed in complete
  silence, with nothing to see anywhere.
• Changed: only uncaught exceptions, fatal shutdowns and userland fatal errors
  are reported. Notices and warnings are not, and there is no setting to restore
  them. Each one was a blocking HTTP request during page rendering, so one
  warning inside a loop over five hundred rows was five hundred requests in a
  single page load.
• Changed: the same error on the same line is reported once, and a request stops
  at twenty reports.
• Fixed: an exception message, class name or file path too long for the server
  now arrives trimmed instead of being refused and lost.
• Fixed: French social security numbers from Corsica are masked before sending.
  The check digit was computed in a way that could never succeed for them, so
  they travelled in clear.
• Fixed: a server address that already ends in /api/v1 is accepted, and
  surrounding whitespace is ignored.
• Changed: requires PSR-3 version 2 or 3. The bundled logger is typed and cannot
  run against version 1.

Full changelog: readme.txt