Add GitHub Sponsors funding configuration (#42) #100

Job	Run time
CI / Context	3s
CI / Generate matrix	14s
CI / Check governance	3s
CI / 8.3 mysql80 phpunit all	1m 59s
CI / 8.3 prf-low mariadb phpunit all	2m 27s
CI / 8.3 mysql80 phplinting	2m 15s
CI / 8.4 mysql84 phpunit all	1m 56s
CI / Dispatch tag patch release	0s
	8m 57s

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