Update macro conditions for ESP8266 and ESP32 ####

Modify `min` and `max` macro definitions
in `MySensors.h` to exclude ESP8266 and ESP32
architectures. This change prevents potential
redefinition errors or conflicts when compiling
for these specific architectures.

MySensors.h

@@ -96,11 +96,11 @@
 #define _BV(x) (1<<(x))	//!< _BV
 #endif
 
-#if !defined(min) && !defined(__linux__)
+#if !defined(min) && !defined(__linux__) && !defined(ARDUINO_ARCH_ESP8266) && !defined(ARDUINO_ARCH_ESP32)
 #define min(a,b) ((a)<(b)?(a):(b)) //!< min
 #endif
 
-#if !defined(max) && !defined(__linux__)
+#if !defined(max) && !defined(__linux__) && !defined(ARDUINO_ARCH_ESP8266) && !defined(ARDUINO_ARCH_ESP32)
 #define max(a,b) ((a)>(b)?(a):(b)) //!< max
 #endif