update BLE library for ESP32 env compatibility

with the last version of ESP32 arduino env it is not possible to compile on ESP32, we get "missing gatt_api.h" ERROR. So as to avoid that we need to use the last version of the nkolban library for BLE 0.4.16

lib/ESP32_BLE_Arduino/src/BLERemoteDescriptor.h

@@ -24,13 +24,13 @@ class BLERemoteCharacteristic;
 class BLERemoteDescriptor {
 public:
 	uint16_t    getHandle();
+	BLERemoteCharacteristic* getRemoteCharacteristic();
 	BLEUUID     getUUID();
 	std::string readValue(void);
 	uint8_t     readUInt8(void);
 	uint16_t    readUInt16(void);
 	uint32_t    readUInt32(void);
 	std::string toString(void);
-	//void        registerForNotify(void (*notifyCallback)(BLERemoteCharacteristic *pBLERemoteCharacteristic, uint8_t *pData, size_t length, bool isNotify));
 	void        writeValue(uint8_t* data, size_t length, bool response = false);
 	void        writeValue(std::string newValue, bool response = false);
 	void        writeValue(uint8_t newValue, bool response = false);