v0.6.0

• Added #[Property(auto: true)]: a generator is derived from the property's
  own signature for every parameter the provider does not cover, via core
  0.4's Gen::forParameters() (@param psalm type over native type; a type
  it cannot read throws naming the method and the parameter). The provider —
  explicit or the <testMethod>Generators convention — becomes the overrides
  and may be partial; a full provider stays legal; with auto a provider key
  that is not a parameter of the property is an error. Strictly opt-in — it
  will never become the default — and deliberately without a PROPERTY_AUTO
  environment variable. auto: false behavior is unchanged.
• Requires rasuvaeff/property-testing-core ^0.4.