Eslint config: enable Flow indexed access by default #3618
Merged
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This commit partially reverts #2662
Flow config option
indexed_access
was removed in https://github.com/facebook/flow/releases/tag/v0.164.0 (indexed access is enabled by default in Flow) so this commit only enabled the Eslint rule and fixes related issues in our codebase.See: https://flow.org/en/docs/types/indexed-access/