v1.0.1 to fix issue with core v2.0.0+

### Releases v1.0.1

1. Avoid using `PIN_D1 (GPIO1)` in your code due to issue with core v2.0.0 and v2.0.1. Check [ESP32 Core v2.0.1 / 2.0.1 RC1 crashes if using pinMode with GPIO1 #5868](espressif/arduino-esp32#5868). Only OK with core v1.0.6-
2. Don't use `float` in `ISR` due to issue with core v2.0.0 and v2.0.1. Only OK with core v1.0.6-.
3. Delete Blynk-related examples
4. Add changelog.md

Author: khoih-prog

CONTRIBUTING.md

@@ -14,9 +14,9 @@ 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. 1.8.15) or Platform.io version
-* `ESP32` Core Version (e.g. ESP32 core v2.0.0-rc1)
-* `ESP32-S2` Board type (e.g. ESP32S2_DEV Module, ESP32_S2_Saola, etc.)
+* Arduino IDE version (e.g. 1.8.16) or Platform.io version
+* `ESP32` Core Version (e.g. ESP32 core v2.0.1)
+* `ESP32` Board type (e.g. ESP32_DEV Module, ESP32_S2_DEV, etc.)
 * 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:
@@ -27,14 +27,14 @@ Please ensure to specify the following:
 ### Example
 
 ```
-Arduino IDE version: 1.8.15
-ESP32 core v2.0.0-rc1
+Arduino IDE version: 1.8.16
+ESP32 Core Version 2.0.1
 ESP32S2_DEV Module
 OS: Ubuntu 20.04 LTS
-Linux xy-Inspiron-3593 5.4.0-81-generic #91-Ubuntu SMP Thu Jul 15 19:09:17 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
+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
 
 Context:
-I encountered a crash while using TimerInterrupt.
+I encountered a crash while using ESP32_New_TimerInterrupt.
 
 Steps to reproduce:
 1. ...