Bump symfony/config from 2.6.3 to 2.8.52

[dependabot-preview]

Bumps symfony/config from 2.6.3 to 2.8.52.

Changelog

Sourced from symfony/config's changelog.

CHANGELOG

5.1.0

• updated the signature of method NodeDefinition::setDeprecated() to NodeDefinition::setDeprecation(string $package, string $version, string $message)
• updated the signature of method BaseNode::setDeprecated() to BaseNode::setDeprecation(string $package, string $version, string $message)
• deprecated passing a null message to BaseNode::setDeprecated() to un-deprecate a node
• deprecated BaseNode::getDeprecationMessage(), use BaseNode::getDeprecation() instead

5.0.0

• Dropped support for constructing a TreeBuilder without passing root node information.
• Removed the root() method in TreeBuilder, pass the root node information to the constructor instead
• Added method getChildNodeDefinitions() to ParentNodeDefinitionInterface
• Removed FileLoaderLoadException, use LoaderLoadException instead

4.4.0

• added a way to exclude patterns of resources from being imported by the import() method

4.3.0

• deprecated using environment variables with cannotBeEmpty() if the value is validated with validate()
• made Resource\* classes final and not implement Serializable anymore
• deprecated the root() method in TreeBuilder, pass the root node information to the constructor instead

4.2.0

• deprecated constructing a TreeBuilder without passing root node information
• renamed FileLoaderLoadException to LoaderLoadException

4.1.0

• added setPathSeparator method to NodeBuilder class
• added third $pathSeparator constructor argument to BaseNode
• the Processor class has been made final

4.0.0

• removed ConfigCachePass

3.4.0

... (truncated)

Commits

• 7dd5f50 minor #28912 [Config] Use intersection type when referring to ParentNodeDefin...
• 853f9e0 [cs] correct invalid @param types
• 65384ce bug #29152 [Config] Unset key during normalization (ro0NL)
• a8fe58b [Config] Unset key during normalization
• 978890f Bump phpunit XSD version to 5.2
• 506aaec Fix ini_get() for boolean values
• a049706 Use intersection type when referring to ParentNodeDefinitionInterface
• fb34692 Consistently throw exceptions on a single line
• a145664 Fix code examples in PHPDoc
• 06c0be4 Enable native_constant_invocation CS fixer
• Additional commits viewable in compare view

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