Update in line with latest Adafruit_Blinka repo

diff --cc src/board.py
Simple merge

diff --cc src/digitalio.py
Simple merge

diff --cc src/microcontroller/__init__.py
Simple merge

diff --cc src/microcontroller/pin.py
Simple merge

diff --cc src/pwmio.py
index b4819daf07365108902b04dd8f7bb62a25e5ecfb,b37549f2af946e68f6216bc8ad7933bff383aed0..9ded9fd43faa956a746ae395037b8f6648d0a443
--- 1/src/pwmio.py
--- 2/src/pwmio.py
+++ b/src/pwmio.py
@@@ -22,10 -22,10 +22,12 @@@ elif detector.board.any_coral_board
      from adafruit_blinka.microcontroller.generic_linux.sysfs_pwmout import PWMOut
  elif detector.board.any_giant_board:
      from adafruit_blinka.microcontroller.generic_linux.sysfs_pwmout import PWMOut
 +elif detector.board.any_pcduino_board:
 +    from adafruit_blinka.microcontroller.generic_linux.sysfs_pwmout import PWMOut
  elif detector.board.any_beaglebone:
      from adafruit_blinka.microcontroller.am335x.sysfs_pwmout import PWMOut
+ elif detector.board.any_lemaker:
+     from adafruit_blinka.microcontroller.generic_linux.sysfs_pwmout import PWMOut
  elif detector.board.any_siemens_simatic_iot2000:
      from adafruit_blinka.microcontroller.am65xx.pwmout import PWMOut
  elif detector.board.any_rock_pi_board: