v0.172.0

Bug Fixes:

• Exact objects are treated as truthy in logical expressions
• Add support for operations on $Values<> types in an export position (e.g. Try Flow)
• Respect the order of module.file_ext when resolving imports. Before, they were tried alphabetically.

Misc:

• Change signature-verification-failure from a lint to a normal error. It is no longer valid in the [lints] section of .flowconfig.
• Improve performance of IDE commands when Flow is busy typechecking