Bug fixes and TLS support for PHP Redis extension

• PHP Redis extension support TLS since 5.3.0
• Fixes AUTH may not cleanup last error
• Fixes port always be 6379 even no port specified in host string and specified the port number other then 6379 in constructor
• Fixes persistent too
• Add PHP 7.4 to unit tests
• Fix test framework issues

Add Credis_Client::VERSION constant

fix syntax error urgently (#138)

closes #137

PHP 7.4 Support

change argument order of implode (#131)

to follow the documented order,
reverse order is deprecated from php 7.4 on

1.11.0: Enable encrypted connections with TLS (#129)

* Enable encrypted connections with TLS

Use standalone PHP driver because PHP Redis extension doesn't work with TLS.
Syntax `$redis = new Credis_Client('tls://host[:port][/persistence_identifier]')`

* Enable encrypted connections with TLS

Fix hashing of array arguments for Credis_Cluster

1.10.1

Credis_Cluster - Fix hashing mechanism for array arguments (#111)

`exists` should return an int.

Merge pull request #101 from Xon/patch-1

Test against redis v4 & test phpredis v4 (breaking API change for exists())

Fix compatibility with PHP <5.6

WIP: Add unit tests for PHP 5.5 (#95)

* Add unit tests for PHP 5.5

Lots of improvements! Thanks @Xon!

Unit tests & multi/exec fixes (#89)

* Suppress errors on cleanup (and avoid potentially deleting the config files)

* The pubsub test crassh on phpredis 3.13 and below, but works with 3.1.4RCx.

* All basic tests pass (except pubsub with phpredis which explicitly fails)

* Fix-up testMasterSlave test

* Give Redis time to exit

* Fixup testGetHostAndPort test

* Allow php7.x opcache to optimize the array to be vastly more compact, and use an O(1) lookup rater than a array scan of strings.

* When in standalone multi() mode, exec() now decodes the result, and discard() destroys any pipelining or multi setup.

* Rearange testPipeline & testPipelineTransaction to have the same test functionality.

Add tests for zrangebyscore/zrevrangebyscore

* Fix pipeline/multi modes for more commands

* Shim zRange/zRevRange arguments before they are sent to phpredis & expand test coverage

* remove unneeded variable

* In fluent mode, credis returns itself

* Add test for watch/unwatch, ensure the connection is closed/cleaned up when a pipeline&multi or watch fails.

* Use diskless replication and add some delays for initial setup time.

* Implement info() command for Sentinel

* sentinel tests now wait for replication setup to finish

* Run all tests

* Restore php5.6 support in Credis_cluster

* Compile redis from source so redis-sentinel is available

* Tweak travis build

* Move binaries to the right directory

* Update PATH environment variable rather than move binaries around.

* Remove debugging code

* Better tolerance of slop in the timeout

* Push common code into CredisTestCommon

* Use role() instead of info() to reliably get the slave connecting state

* Move sleep after connect check

* Add waitForSlaveReplication for reliable waiting for master-slave replication

1.8.2

Handle is an application convert a php error into an Exception

New features and improvements

Support for more Redis commands, Credis_Sentinel, and more.