README.md: add ddt lib (#3460)
README.md: add ddt lib (#3460)

Co-authored-by: Santiago Rodriguez <ab24d71c625e13acc444da2f71393eabb3f5c848@MB-SRodriguez.local>
sadlil/awesome-go,pconcepcion/awesome-go,jmelfi/awesome-go,avelino/awesome-go,theckman/awesome-go