Bump phpunit/phpunit from 5.7.27 to 7.2.7

[dependabot-preview]

Bumps phpunit/phpunit from 5.7.27 to 7.2.7.

Changelog

Sourced from phpunit/phpunit's changelog.

[7.2.7] - 2018-07-15

Fixed

• Fixed #3154: Global constants as default parameter values are not handled correctly in namespace
• Fixed #3189: PHPUnit 7.2 potentially leaves a messy libxmlerror state
• Fixed #3199: Code Coverage for PHPT tests does not work when PHPDBG is used

[7.2.6] - 2018-06-21

Fixed

• Fixed #3176: PHPUnit 7.2.5 breaks backward compatibility

[7.2.5] - 2018-06-21

Fixed

• Fixed #3093: Unable to chain a [**dataProvider**](https://github.com/dataProvider) in method a with a [**depends**](https://github.com/depends) in method b
• Fixed #3174: Code generator for test doubles does not handle proxied methods with variadic parameters correctly

[7.2.4] - 2018-06-05

Fixed

• Fixed #3160: TeamCity logfile writer broken on Windows

[7.2.3] - 2018-06-03

Fixed

• Fixed #3156: Combined use of [**depends**](https://github.com/depends) and [**dataProvider**](https://github.com/dataProvider) is not handled correctly

[7.2.2] - 2018-06-01

Changed

• Ensure that phpunit/php-code-coverage is used in version ^6.0.7

[7.2.1] - 2018-06-01

Fixed

• Fixed #3155: Calling getStatus() on a TestCase object before the respective test has been executed results in type error

[7.2.0] - 2018-06-01

Added

• Implemented #3042: Add TestCase::expectNotToPerformAssertions() method as alternative to [**doesNotPerformAssertions**](https://github.com/doesNotPerformAssertions) annotation

... (truncated)

Commits

• 8e878af Prepare release
• 2f2c034 Update ChangeLog
• 03b93cf Generator will now try to fallback to root namespace constants
• 68a8333 Fix CS/WS issue
• 77ec7e6 Add exception
• d8f3aea Help PHPStan make sense of this
• 3afc7e1 Work around https://github-redirect.dependabot.com/phpstan/phpstan/issues/1185
• 0ce3e2c Update ChangeLog
• 34b954a Clean up the php process command builder
• d4f9ac9 Remove travis changes used to validate phpdbg compatibility
• Additional commits viewable in compare view

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Superseded by #25.