[v1.20.0.rc11] release-candidate

### New Features
- Esp32 touchpad functionality exposed to micropy
- Upgraded LittleFS to v2.0 (Note: this update will format the File system !! )

### Improvements
- Added RSA signature generation API to moducrypto
- Added support for saving strings in NVS - PR #226 , author: @psychogenic
- LTE class refactoring
- BLE advertisement parameters are now configurable via MicroPython  <author>: @ninoita
- Added BLE raw adv data setting <author>: @ninoita

### Bug Fix
- Fix UART.sendbreak not defaulting to 13 bits as suggested by Documentation Issue #280
- Fix wlan.isconnected not returning True when station is connected in AP mode Issue #244

Author: iwahdan88

esp32/pycom_version.h

@@ -10,7 +10,7 @@
 #ifndef VERSION_H_
 #define VERSION_H_
 
-#define SW_VERSION_NUMBER                              "1.20.0.rc10"
+#define SW_VERSION_NUMBER                              "1.20.0.rc11"
 
 #define LORAWAN_VERSION_NUMBER                         "1.0.2"