new release preparation #192

Job	Run time
minitest (2.6, rails_6_0, vips)	2m 47s
minitest (2.6, rails_6_0, mini_magick)	2m 34s
minitest (2.6, rails_6_1, vips)	2m 35s
minitest (2.6, rails_6_1, mini_magick)	2m 56s
minitest (2.7, rails_6_0, vips)	2m 58s
minitest (2.7, rails_6_0, mini_magick)	2m 37s
minitest (2.7, rails_6_1, vips)	2m 42s
minitest (2.7, rails_6_1, mini_magick)	2m 35s
minitest (2.7, rails_7_0, vips)	1m 18s
minitest (2.7, rails_7_0, mini_magick)	1m 19s
minitest (2.7, rails_next, vips)	1m 32s
minitest (2.7, rails_next, mini_magick)	1m 33s
minitest (3.0, rails_6_1, vips)	1m 56s
minitest (3.0, rails_6_1, mini_magick)	1m 57s
minitest (3.0, rails_7_0, vips)	35s
minitest (3.0, rails_7_0, mini_magick)	36s
minitest (3.0, rails_next, vips)	44s
minitest (3.0, rails_next, mini_magick)	44s
minitest (3.1, rails_7_0, vips)	45s
minitest (3.1, rails_7_0, mini_magick)	46s
minitest (3.1, rails_next, vips)	1m 2s
minitest (3.1, rails_next, mini_magick)	43s
minitest (3.2, rails_7_0, vips)	41s
minitest (3.2, rails_7_0, mini_magick)	42s
minitest (3.2, rails_next, vips)	45s
minitest (3.2, rails_next, mini_magick)	43s
	40m 5s

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