Merge pull request #2411 from finos/intersection-observer #1486

Job	Run time
initialize	4s
build_pyodide (ubuntu-20.04)	20m 55s
lint_python (ubuntu-20.04, 3.9)	3m 52s
build_js (ubuntu-20.04, 3.9, 18.x)	16m 1s
build_python (ubuntu-20.04, 3.9, 2014, 18.x, false, false)	24m 48s
test_js (ubuntu-20.04, 3.9, 18.x)	14m 52s
benchmark_js	0s
benchmark_python	0s
test_python (ubuntu-20.04, 3.9, 18.x, false, false)	6m 44s
test_js_and_python (ubuntu-20.04, 3.9, 18.x)	7m 4s
test_python_sdist	0s
publish	0s
	1h 34m 20s

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