tests

Support both Webpacker and Shakapacker #1256

Job	Run time
rspec (pageflow, 2.6, ., bin/rspec --tag ~js, true)	9m 1s
trigger-edge-build	0s
rspec (pageflow, 3.2, ~> 6.1, ., bin/rspec --tag ~js, true)	6m 26s
jest (pageflow, package)	1m 55s
rspec (pageflow, 2.6, ., bin/rspec-with-retry --tag js)	4m 39s
jest (pageflow-paged, entry_types/paged/packages/pageflow-paged)	1m 32s
rspec (pageflow, 3.2, ~> 6.1, ., bin/rspec-with-retry --tag js)	4m 16s
jest (pageflow-paged-react, entry_types/paged/packages/pageflow-paged-react)	1m 35s
rspec (pageflow_paged, 2.6, entry_types/paged, pageflow_paged, bin/rspec)	3m 52s
jest (pageflow-scrolled, entry_types/scrolled/package)	2m 38s
rspec (pageflow_paged, 3.2, ~> 6.1, entry_types/paged, pageflow_paged, bin/rspec)	4m 19s
rspec (pageflow_scrolled, 2.6, entry_types/scrolled, pageflow_scrolled, bin/rspec --tag ~js)	6m 34s
rspec (pageflow_scrolled, 3.2, ~> 6.1, entry_types/scrolled, pageflow_scrolled, bin/rspec --tag ~js)	4m 15s
rspec (pageflow_scrolled, 2.6, entry_types/scrolled, pageflow_scrolled, bin/rspec-with-retry-on-t...	4m 45s
rspec (pageflow_scrolled, 3.2, ~> 6.1, entry_types/scrolled, pageflow_scrolled, bin/rspec-with-re...	3m 55s
	59m 42s

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