Bump up v5.2.0.beta5 #334

Job	Run time
ruby-versions / Generate Ruby versions	4s
build (2.5, 0.1.7, /tmp/local)	45s
build (2.5, 0.1.7)	26s
build (2.5, 0.2.5, /tmp/local)	45s
build (2.5, 0.2.5)	27s
build (2.6, 0.1.7, /tmp/local)	46s
build (2.6, 0.1.7)	29s
build (2.6, 0.2.5, /tmp/local)	1m 3s
build (2.6, 0.2.5)	33s
build (2.7, 0.1.7, /tmp/local)	49s
build (2.7, 0.1.7)	29s
build (2.7, 0.2.5, /tmp/local)	50s
build (2.7, 0.2.5)	29s
build (3.0, 0.1.7, /tmp/local)	29s
build (3.0, 0.1.7)	18s
build (3.0, 0.2.5, /tmp/local)	23s
build (3.0, 0.2.5)	19s
build (3.1, 0.1.7, /tmp/local)	21s
build (3.1, 0.1.7)	17s
build (3.1, 0.2.5, /tmp/local)	22s
build (3.1, 0.2.5)	19s
build (3.2, 0.1.7, /tmp/local)	34s
build (3.2, 0.1.7)	15s
build (3.2, 0.2.5, /tmp/local)	25s
build (3.2, 0.2.5)	19s
build (3.3, 0.1.7, /tmp/local)	34s
build (3.3, 0.1.7)	15s
build (3.3, 0.2.5, /tmp/local)	23s
build (3.3, 0.2.5)	18s
build (head, 0.1.7, /tmp/local)	19s
build (head, 0.1.7)	27s
build (head, 0.2.5, /tmp/local)	20s
build (head, 0.2.5)	15s
	15m 7s

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