Merge pull request adafruit#6238 from dhalbert/ringbuf-free-fix

Free ringbuf buffer by relying on gc, not gc_free()

Merge pull request adafruit#6184 from PontusO/main

Added Challenger 840 board.

Merge pull request adafruit#6212 from dhalbert/7.2.x-6103-backport

7.2.x adafruit#6103 backport

Merge pull request adafruit#6168 from dhalbert/ReloadException-in-repl

fix ReloadException when in REPL

Merge pull request adafruit#6153 from tannewt/refine_autoreload

Further refine autoreload

Merge pull request adafruit#6142 from dhalbert/7.2.x-autoreload-fake-…

…sleep

7.2.x autoreload rework (again)

Merge pull request adafruit#6077 from kmatch98/trial_repl

fix REPL terminal garbled characters upon code.py finished

Merge pull request adafruit#6077 from kmatch98/trial_repl

fix REPL terminal garbled characters upon code.py finished

Merge pull request adafruit#6038 from jepler/merge-1.18

Merge 1.18

Merge pull request adafruit#6060 from dhalbert/update-frozen-libs-7.2.0

update frozen libraries before 7.2.0 RC