refactor: replace loose comparisons

[kenjis]

Description

• replace loose comparisons

Checklist:

• [x] Securely signed commits
• [ ] Component(s) with PHPDoc blocks, only if necessary or adds value
• [ ] Unit testing, with >80% coverage
• [ ] User guide updated
• [x] Conforms to style guide

[kenjis]

phpstan-strict-rules did not report errors.

$this->predis->zrangebyscore() returns only array. But $this->redis->zRangeByScore() returns array|false|Redis. That is the reason?

[michalsn]

Yes, most likely. Thanks.