* mbedtls 2.7.0 (mbedtls-2.7.0-0-g32605dc8)
Wholesale import, with a few changes from earlier preserved through.
Ideally we would soon get to the point of having no divergences from
upstream.
* tls: add function to adjust mbedTLS debug level
* Fix some subtle timing issues with gpio.pulse
* Add the pulse:update method
* Allow getstate to work on stopped pulsers
* Make gpio.mode(, gpio.OUTPUT) actually set the output mode
* Added some more documentation
Disable the error callback of mqtt.client:connect() after a successful connection.
This will prevent this function to be called after a future disconnection.
Instead the "offline" function is called.
in float build, uV and sign are included in mV
in int build, uV and mV are absolute, sign is -1, 0, 1
added rounding of uV values
added optional test function
* ads1015 is supported, up to 4 devices can be connected at the same time
* removed debug, updated documentation
* changed to oop API
* added __gc to handle active timer cleanup
* reworked argument validation and error reporting
* stack is no longer messed up after __del
* ws2812 effects and color utils modules added
* Added documentation for new modules to mkdocs.yml
* changed mode option to string, documentation, default modules fixed
* updated user_modules.h
* add final sqlite3 patch
* remove unused defines, join caching code with esp vfs code to reduce exported symbols and shrink final file size
* Modules should by default be disabled and in alphabetical order
* mbedTLS update
* mbedtls: vsnprintf macroification
* Further update mbedTLS to 2.6.1
* mbedtls: make debugging work again
* Silence SSL messages on normal teardown
* Drop DTLS support from mbedtls
* Add support of counting of interrupts
* Update the timestamp when interrupt happens during dispatch. Also
clear out interrupts when setting up a new callback
* Make the rtc variables not be cleared by the .bss initialization
* Move the save to the right place
* Make sure that we reset the rtctime to 0 if we didn't sleep properly.
* Setting the seconds to zero doesn't update the dsleep calibration
Nathaniel Wesley Filardo
Philip Gladstone
Arnim Läuger
Marcel Stör
Frank Exoo
Pawel Jasinski
Konrad Hübner
Terry Ellison
Luiz Felipe Silva
Johny Mattsson
Carlos Bastos Filho
Lukáš Voborský
Mark Deneen