1.7.2 - Define the meaning of 'type' for BusIO Registers

Bump to 1.7.2

1.7.1 - Released memory allocated in constructors

Bump to 1.7.1

1.7.0 - Multiple fixes

This release includes:

• Make compatible with Heltec's CubeCell Arduino-core
• Added an SPI transfer method for chips like the STM32 that don't have one built-in
• Buffer arguments of I2CDevice write functions are changed to const so the arguments can't change the contents of the buffers

Thanks @WereCatf @howard-wa9axq and @mirzafahad for the excellent PRs

1.6.0 - Fixed support for megaTinyCore, added support for DxCore

Thanks @SpenceKonde for the contribution!

1.5.0 - Allow library build with Spark/Particle

Thanks @rgiese for the contribution!

1.4.1 - Added support for more megaAVR targets

Bump to 1.4.1

Fast software SPI

We now use 'fast io' when available on Arduino platforms to bitbang software SPI

1.3.3 - Added basic caching support for chips with write-only registers

Bump to 1.3.3

1.3.2 - Redid #ifdefs

fix dox

Add attiny support

now works with megaTinyCore