Merge pull request #425 from lifeart/fix-estree-external #849

Job	Run time
lint	18s
test (20)	27s
test (22)	24s
test (18)	33s
test (24)	20s
test-prettier-versions (3.7.1)	28s
test-prettier-versions (latest)	25s
test-prettier-versions (3.7.3)	25s
test-prettier-versions (3.5.3)	24s
test-prettier-versions (3.7.0)	21s
test-prettier-versions (3.7.2)	23s
test-prettier-versions (3.6.2)	26s
test-prettier-versions (3.6.1)	26s
test-prettier-versions (3.6.0)	26s
	5m 46s

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