v2.1.0 to fix multiple-definitions linker error

Releases v2.1.0

1. Fix multiple-definitions linker error. Check Multiple definitions #1
2. Add example multiFileProject to demo for multiple-file project to avoid multiple-definitions linker error

v2.0.3 to auto detect ESP32 core to use for WT32_ETH01, to fix bug in WT32_ETH01 examples to reduce connection time and to remove library's redundant code

Releases v2.0.3

Warning: Releases v2.0.3+ can be used and autodetect ESP32 core v2.0.0+ or v1.0.6- for WT32_ETH01

1. Auto detect ESP32 core to use for WT32_ETH01
2. Fix bug in WT32_ETH01 examples to reduce connection time
3. Remove library's redundant code

v2.0.2 to update `platform.ini` and `library.json`

Releases v2.0.2

1. Update platform.ini and library.json to use original khoih-prog instead of khoih.prog after PIO fix

Release v2.0.1 to update to use WebServer_WT32_ETH01 v1.2.0

Releases v2.0.1

1. Update to use WebServer_WT32_ETH01 v1.2.0

Release v2.0.0 to support WT32_ETH01 (ESP32 + LAN8720)

Initial Releases v2.0.0

1. Initial coding to port AsyncUDP to WT32_ETH01 (ESP32 + LAN8720)
2. Add more examples.
3. Add debugging features.
4. Bump up to v2.0.0 to sync with AsyncUDP v2.0.0.