v1.5.0 to fix multiple-definitions linker error

### Releases v1.5.0

1. Fix `multiple-definitions` linker error and weird bug related to `src_cpp`. Check [Different behaviour using the src_cpp or src_h lib #80](khoih-prog/ESPAsync_WiFiManager#80)
2. Optimize library code by using `reference-passing` instead of `value-passing`
3. Update all examples

Author: khoih-prog

CONTRIBUTING.md

@@ -14,8 +14,8 @@ If you don't find anything, please [open a new issue](https://github.com/khoih-p
 
 Please ensure to specify the following:
 
-* Arduino IDE version (e.g. 1.8.16) or Platform.io version
-* `ESP8266`,`ESP32` or `STM32` Core Version (e.g. ESP8266 core v3.0.2, ESP32 v2.0.1 or STM32 v2.1.0)
+* Arduino IDE version (e.g. 1.8.19) or Platform.io version
+* `ESP8266`,`ESP32` or `STM32` Core Version (e.g. ESP8266 core v3.0.2, ESP32 v2.0.2 or STM32 v2.2.0)
 * Contextual information (e.g. what you were trying to achieve)
 * Simplest possible steps to reproduce
 * Anything that might be relevant in your opinion, such as:
@@ -26,10 +26,10 @@ Please ensure to specify the following:
 ### Example
 
 ```
-Arduino IDE version: 1.8.16
-ESP32 Core Version 2.0.1
+Arduino IDE version: 1.8.19
+ESP32 Core Version 2.0.2
 OS: Ubuntu 20.04 LTS
-Linux xy-Inspiron-3593 5.4.0-90-generic #101-Ubuntu SMP Fri Oct 15 20:00:55 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
+Linux xy-Inspiron-3593 5.4.0-91-generic #102-Ubuntu SMP Fri Nov 5 16:31:28 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
 
 Context:
 I encountered an endless loop while trying to connect to Local WiFi.