[BC BREAK] removed "array" type hint from OptionsResolverInterface methods
setRequired(), setAllowedValues(), addAllowedValues(), setAllowedTypes() and
addAllowedTypes()
added OptionsResolver::setDefault()
added OptionsResolver::hasDefault()
added OptionsResolver::setNormalizer()
added OptionsResolver::isRequired()
added OptionsResolver::getRequiredOptions()
added OptionsResolver::isMissing()
added OptionsResolver::getMissingOptions()
added OptionsResolver::setDefined()
added OptionsResolver::isDefined()
added OptionsResolver::getDefinedOptions()
added OptionsResolver::remove()
added OptionsResolver::clear()
deprecated OptionsResolver::replaceDefaults()
deprecated OptionsResolver::setOptional() in favor of setDefined()
deprecated OptionsResolver::isKnown() in favor of isDefined()
[BC BREAK] OptionsResolver::isRequired() returns true now if a required
option has a default value set
[BC BREAK] merged Options into OptionsResolver and turned Options into an
interface
deprecated Options::overload() (now in OptionsResolver)
deprecated Options::set() (now in OptionsResolver)
deprecated Options::get() (now in OptionsResolver)
deprecated Options::has() (now in OptionsResolver)
deprecated Options::replace() (now in OptionsResolver)
[BC BREAK] Options::get() (now in OptionsResolver) can only be used within
lazy option/normalizer closures now
[BC BREAK] removed Traversable interface from Options since using within
lazy option/normalizer closures resulted in exceptions
[BC BREAK] removed Options::all() since using within lazy option/normalizer
closures resulted in exceptions
[BC BREAK] OptionDefinitionException now extends LogicException instead of
RuntimeException
[BC BREAK] normalizers are not executed anymore for unset options
normalizers are executed after validating the options now
[BC BREAK] an UndefinedOptionsException is now thrown instead of an
InvalidOptionsException when non-existing options are passed
