Update dependency zendframework/zend-cache to v2.9.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
zendframework/zend-cache	require	minor	^2.7 -> 2.9.0

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Release Notes

zendframework/zend-cache

v2.9.0

Compare Source

Added

• #​178 adds support for PHP 7.3.

Changed

• #​186 replaces
  deprecated delete() calls with del() in Redis adapter. delete()
  function is deprecated since version 5.0.0 and del() is available
  since version 2.1.0.

Deprecated

• Nothing.

Removed

• #​178 removes support for zend-stdlib v2 releases.

Fixed

• Nothing.

v2.8.3

Compare Source

Added

• Nothing.

Changed

• Nothing.

Deprecated

• Nothing.

Removed

• Nothing.

Fixed

• #​184 fixes
  an issue with SimpleCacheDecorator where elements were deleted
  after creation. Wrong TTL was set instead of using default value
  from options.

• #​182 fixes
  a typo in variable name within the ExtMongoDbResourceManager::getResource
  method which prevented using custom db name when using that adapter.

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