Package updates
Package updates

 - symfony/yaml updated from v3.0.4 to v3.1.2
   See changes: https://github.com/symfony/yaml/compare/v3.0.4...v3.1.2
   Release notes: https://github.com/symfony/yaml/releases/tag/v3.1.2

 - sebastian/exporter updated from 1.2.1 to 1.2.2
   See changes: https://github.com/sebastianbergmann/exporter/compare/1.2.1...1.2.2
   Release notes: https://github.com/sebastianbergmann/exporter/releases/tag/1.2.2

 - sebastian/environment updated from 1.3.5 to 1.3.7
   See changes: https://github.com/sebastianbergmann/environment/compare/1.3.5...1.3.7
   Release notes: https://github.com/sebastianbergmann/environment/releases/tag/1.3.7

 - phpunit/phpunit-mock-objects updated from 3.1.3 to 3.2.3
   See changes: https://github.com/sebastianbergmann/phpunit-mock-objects/compare/3.1.3...3.2.3
   Release notes: https://github.com/sebastianbergmann/phpunit-mock-objects/releases/tag/3.2.3

 - phpunit/php-timer updated from 1.0.7 to 1.0.8
   See changes: https://github.com/sebastianbergmann/php-timer/compare/1.0.7...1.0.8
   Release notes: https://github.com/sebastianbergmann/php-timer/releases/tag/1.0.8

 - phpunit/php-code-coverage updated from 3.3.1 to 4.0.0
   See changes: https://github.com/sebastianbergmann/php-code-coverage/compare/3.3.1...4.0.0
   Release notes: https://github.com/sebastianbergmann/php-code-coverage/releases/tag/4.0.0

 - webmozart/assert installed in version 1.0.2
   Release notes: https://github.com/webmozart/assert/releases/tag/1.0.2

 - phpdocumentor/reflection-common installed in version 1.0
   Release notes: https://github.com/phpDocumentor/ReflectionCommon/releases/tag/1.0

 - phpdocumentor/type-resolver installed in version 0.2
   Release notes: https://github.com/phpDocumentor/TypeResolver/releases/tag/0.2

 - phpdocumentor/reflection-docblock updated from 2.0.4 to 3.1.0
   See changes: https://github.com/phpDocumentor/ReflectionDocBlock/compare/2.0.4...3.1.0
   Release notes: https://github.com/phpDocumentor/ReflectionDocBlock/releases/tag/3.1.0

 - phpspec/prophecy updated from v1.6.0 to v1.6.1
   See changes: https://github.com/phpspec/prophecy/compare/v1.6.0...v1.6.1
   Release notes: https://github.com/phpspec/prophecy/releases/tag/v1.6.1

 - myclabs/deep-copy updated from 1.5.0 to 1.5.1
   See changes: https://github.com/myclabs/DeepCopy/compare/1.5.0...1.5.1
   Release notes: https://github.com/myclabs/DeepCopy/releases/tag/1.5.1

 - phpunit/phpunit updated from 5.3.2 to 5.4.6
   See changes: https://github.com/sebastianbergmann/phpunit/compare/5.3.2...5.4.6
   Release notes: https://github.com/sebastianbergmann/phpunit/releases/tag/5.4.6

 - vlucas/phpdotenv updated from v2.2.1 to v2.3.0
   See changes: https://github.com/vlucas/phpdotenv/compare/v2.2.1...v2.3.0
   Release notes: https://github.com/vlucas/phpdotenv/releases/tag/v2.3.0

 - guzzlehttp/promises updated from 1.1.0 to 1.2.0
   See changes: https://github.com/guzzle/promises/compare/1.1.0...1.2.0
   Release notes: https://github.com/guzzle/promises/releases/tag/1.2.0

 - guzzlehttp/psr7 updated from 1.3.0 to 1.3.1
   See changes: https://github.com/guzzle/psr7/compare/1.3.0...1.3.1
   Release notes: https://github.com/guzzle/psr7/releases/tag/1.3.1

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