Merge pull request #1196 from herwinw/data_to_h #1747

Job	Run time
specs (ubuntu, 3.0.6)	1m 36s
RuboCop	24s
specs (ubuntu, 3.1.4)	1m 40s
specs (ubuntu, 3.2.2)	1m 30s
specs (ubuntu, 3.3.0)	1m 38s
specs (macos, 3.0.6)	1m 25s
specs (macos, 3.1.4)	2m 3s
specs (macos, 3.2.2)	1m 15s
specs (macos, 3.3.0)	1m 36s
specs (windows, 3.0.6)	3m 38s
specs (windows, 3.1.4)	5m 56s
specs (windows, 3.2.2)	3m 58s
specs (windows, 3.3.0)	3m 56s
specs (ubuntu, 3.3.0, --enable-frozen-string-literal)	1m 28s
	32m 3s

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