fix: asyncwebserver backwards compatibility #160

Job	Run time
arduino package_esp32_index.json	2m 9s
pio esp32dev\|arduino	1m 40s
arduino package_esp32_dev_index.json	2m 5s
pio esp32dev\|arduino-2	1m 39s
arduino package_esp8266com_index.json	1m 6s
pio esp32dev\|arduino-3	2m 21s
pio esp32-s3-devkitc-1\|arduino	2m 4s
arduino package_rp2040_index.json	48s
pio esp32-s3-devkitc-1\|arduino-2	2m 4s
pio esp32-s3-devkitc-1\|arduino-3	2m 47s
pio huzzah\|espressif8266	1m 26s
	20m 9s

Provide feedback