Fix a bug where we never detached the timer interrupt on ESP32s. (#1984)

Kudos to @homy-newfs8 for finding, isolating, and providing a fix for the bug.
Note: `timerEnd()` needs to happen after `timerDetachInterrupt()`

Fixes #1983

Author: crankyoldgit

src/IRrecv.cpp

@@ -399,6 +399,7 @@ void IRrecv::disableIRIn(void) {
 #endif  // ESP8266
 #if defined(ESP32)
   timerAlarmDisable(timer);
+  timerDetachInterrupt(timer);
   timerEnd(timer);
 #endif  // ESP32
   detachInterrupt(params.recvpin);