[7.x] Bump acorn sub-dependency to version ^7.1.1 (#60239)#60277

Merged

watson merged 1 commit intoelastic:7.xfrom watson:backport/7.x/pr-60239

Mar 17, 2020

+3-3

Commits on Mar 16, 2020

Bump acorn sub-dependency to version ^7.1.1 (elastic#60239 )
watson
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