Disable CI on non-master branches #51

Job	Run time
ci / Build	3m 1s
ci / Lint	1m 15s
ci / Test (0)	1m 26s
ci / Test (1)	1m 9s
ci / Test (2)	1m 34s
ci / Test (3)	55s
ci / Test (4)	1m 47s
ci / Test (5)	56s
ci / Test (6)	57s
ci / Test (7)	1m 3s
ci / Test (8)	1m 1s
ci / Test (9)	1m 52s
ci / Publish Unit Tests Results	1s
	16m 57s

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