Major release v1.2.0

### Major Releases v1.2.0

 1. Enable scan of WiFi networks for selection in Configuration Portal. Check [PR for v1.3.0 - Enable scan of WiFi networks #10](khoih-prog/WiFiManager_NINA_Lite#10). Now you can select optional **SCAN_WIFI_NETWORKS**, **MANUAL_SSID_INPUT_ALLOWED** to be able to manually input SSID, not only from a scanned SSID lists and **MAX_SSID_IN_LIST** (from 2-15)
 2. Fix invalid "blank" Config Data treated as Valid.
 3. Permit optionally inputting one set of WiFi SSID/PWD by using `REQUIRE_ONE_SET_SSID_PW == true`
 4. Enforce WiFi PWD minimum length of 8 chars
 5. Minor enhancement to not display garbage when data is invalid
 6. Fix issue of custom Blynk port (different from 8080 or 9443) not working on ESP32. Check [Custom Blynk port not working for BlynkSimpleEsp32_Async_WM.h #4](khoih-prog/Blynk_Async_WM#4)
 7. To permit auto-reset after configurable timeout if DRD/MRD or non-persistent forced-CP. Check [**Good new feature: Blynk.resetAndEnterConfigPortal() Thanks & question #27**](khoih-prog/Blynk_WM#27)
 8. Fix rare Config Portal bug not updating Config and dynamic Params data successfully in very noisy or weak WiFi situation
 9. Tested with [**Latest ESP32 Core 1.0.6**](https://github.com/espressif/arduino-esp32) for ESP32-based boards.
10. Update examples

CONTRIBUTING.md

@@ -15,7 +15,7 @@ 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. 1.8.13) or Platform.io version
-* `ESP32` Core Version (e.g. ESP32 core v1.0.4)
+* `ESP32` Core Version (e.g. ESP32 core v1.0.6)
 * 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:
@@ -27,9 +27,9 @@ Please ensure to specify the following:
 
 ```
 Arduino IDE version: 1.8.13
-ESP32 Core Version 1.0.4
+ESP32 Core Version 1.0.6
 OS: Ubuntu 20.04 LTS
-Linux xy-Inspiron-3593 5.4.0-64-generic #72-Ubuntu SMP Fri Jan 15 10:27:54 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
+Linux xy-Inspiron-3593 5.4.0-72-generic #80-Ubuntu SMP Mon Apr 12 17:35:00 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
 
 Context:
 The board couldn't autoreconnect to Local Blynk Server after router power recycling.