This patch-level release adds the ability to set the sampling time for ADC channels on the STM32 platforms, which is necessary for some ADC channels such as the internal temperature sensor to function properly. It also fixes a significant bug where two ADC channels, one of which was unconfigured, were being read on STM32 platforms by adc@ rather than one, which was causing garbage values to be generated on the STM32L476 in particular (as on the other STM32 platforms the extra value seems to have gotten discarded).