getPropertiesOfUnionOrIntersectionType: handle types with index signature#31979

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sandersn merged 4 commits intomicrosoft:masterfrom

ajafff:gerpropertiesofuniontype-indexsignature

Mar 13, 2020

Commits on Jun 19, 2019

Commits on Mar 13, 2020

fix typo in checker.ts
sandersn
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