Bump diffenginetray from 16.7.2 to 16.8.0 #503

Job	Run time
Build And Test windows-latest	5m 45s
Build And Test macOS-latest	4m 48s
Build And Test ubuntu-latest	3m 1s
Publish Code Coverage Results	1m 18s
Report Benchmark Results	6s
	14m 58s

Provide feedback