1.7.0

This release makes it possible to create stubs that return a placeholder value until they’re configured, so that a test that calls an unconfigured stub fails instead of crashing.

• The new DefaultStubValueProviding protocol lets a type provide a default value for stubs that return it. DevTesting conforms common standard library and Foundation types, including Array, Bool, Data, Date, Dictionary, floating point and integer types, Optional, Set, String, URL, and UUID.
• Stub has a new init() that returns the default stub value until configured, available when its return type conforms to DefaultStubValueProviding.
• ThrowingStub has a new init() for stubs whose error type is any Error. It throws an unspecified error until configured.
• The new ArbitraryError type is an error for tests that just need an error to throw. RandomValueGenerating has a new randomError(fileID:function:) function that creates one with a random description beginning with the calling file and function. If your tests already extend RandomValueGenerating with a function named randomError, you may need to rename or remove it to avoid ambiguous calls.