Update oss Pyre configuration to preemptively guard again upcoming semantic changes #19
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Summary:
Pyre is going to have a semantic change in its configuration: D35695552.
Basically, we are changing the default behavior on how search paths are discovered. Pre-existing configurations need to explicitly opt-in to the old behavior -- otherwise, they may risk breaking their type check setups.
The added option will lead to a Pyre warning for now, but that warning would go away on the next Pyre upgrade.
Differential Revision: D35724336