Update IRRemote ESP8266 to 2.6.2 and add ESP32 support

lib/IRremoteESP8266/examples/IRsendDemo/IRsendDemo.ino

@@ -28,9 +28,7 @@
  *     for your first time. e.g. ESP-12 etc.
  */
 
-#ifndef UNIT_TEST
 #include <Arduino.h>
-#endif
 #include <IRremoteESP8266.h>
 #include <IRsend.h>
 
@@ -53,7 +51,11 @@ uint8_t samsungState[kSamsungAcStateLength] = {
 
 void setup() {
   irsend.begin();
+#if ESP8266
   Serial.begin(115200, SERIAL_8N1, SERIAL_TX_ONLY);
+#else  // ESP8266
+  Serial.begin(115200, SERIAL_8N1);
+#endif  // ESP8266
 }
 
 void loop() {

lib/IRremoteESP8266/examples/IRsendDemo/platformio.ini

@@ -6,11 +6,23 @@ src_dir=.
 build_flags =
 lib_deps_builtin =
 lib_deps_external =
+lib_ldf_mode = chain+
 
 [env:nodemcuv2]
 platform = espressif8266
 framework = arduino
 board = nodemcuv2
+lib_ldf_mode = ${common.lib_ldf_mode}
+build_flags = ${common.build_flags}
+lib_deps =
+  ${common.lib_deps_builtin}
+  ${common.lib_deps_external}
+
+[env:esp32dev]
+platform = espressif32
+framework = arduino
+board = esp32dev
+lib_ldf_mode = ${common.lib_ldf_mode}
 build_flags = ${common.build_flags}
 lib_deps =
   ${common.lib_deps_builtin}