fix(reactivity): should delete observe value (#597)#598

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yyx990803 merged 2 commits intovuejs:masterfrom underfin:fix-597

Jan 13, 2020

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Commits on Jan 9, 2020

fix(reactivity): should delete observe value (vuejs#597 )
underfin
committed

Commits on Jan 13, 2020

fix: actually use observed keys in Map and WeakMap tests
yyx990803
committed