owncloud/core

Change: Update PHP dependencies

The following have been updated:
- doctrine/cache (1.10.2 to 2.0.3)
- doctrine/dbal (2.13.1 to 2.13.2)
- egulias/email-validator (3.1.0 to 3.1.1)
- icewind/streams (0.7.3 to 0.7.5)
- opis/closure (3.6.1 to 3.6.2)
- pear/pear_exception (v1.0.1 to v1.0.2)
- phpseclib/phpseclib (3.0.6 to 3.0.9)
- psr/log (1.1.3 to 1.1.4)

The following have been updated in files_external/3rdparty:
- firebase/php-jwt (v5.2.1 to v5.3.0)
- google/apiclient (v2.9.1 to v2.9.2)
- google/apiclient-services (v0.164.0 to v0.181.0)
- google/auth (v1.15.0 to v1.15.1)
- guzzlehttp/psr7 (1.7.0 to 1.8.2)
- icewind/smb (3.3.1 to 3.4.1)
- icewind/streams (0.7.3 to 0.7.5)
- phpseclib/phpseclib (3.0.6 to 3.0.9)
- psr/log (1.1.3 to 1.1.4)

https://github.com/owncloud/core/pull/38524
https://github.com/owncloud/core/pull/38598
https://github.com/owncloud/core/pull/38620
https://github.com/owncloud/core/pull/38646
https://github.com/owncloud/core/pull/38648
https://github.com/owncloud/core/pull/38659
https://github.com/owncloud/core/pull/38688
https://github.com/owncloud/core/pull/38749
https://github.com/owncloud/core/pull/38786
https://github.com/owncloud/core/pull/38839
https://github.com/owncloud/core/pull/38845
https://github.com/owncloud/core/pull/38878