Adding references to Tone and AnalogWrite

arduino/Arduino#10653 (comment)

library.properties

@@ -1,11 +1,11 @@
 name=ESP32Servo
-version=0.8.0
+version=0.9.0
 author=Kevin Harrington,John K. Bennett
 maintainer=Kevin Harrington <[email protected]>
-sentence=Allows ESP32 boards to control servo motors using Arduino semantics. 
+sentence=Allows ESP32 boards to control servo, tone and analogWrite motors using Arduino semantics. 
 paragraph=This library can control a many types of servos.<br />It makes use of the ESP32 PWM timers: the library can control up to 16 servos on individual channels<br />No attempt has been made to support multiple servos per channel.<br />
 category=Device Control
-url=http://www.arduino.cc/en/Reference/Servo
+url=https://madhephaestus.github.io/ESP32Servo/annotated.html
 architectures=esp32
-includes=ESP32Servo.h
+includes=ESP32Servo.h,analogWrite.h,tone.h,ESP32Tone.h,ESP32PWM.h