Fix errors by zephir compile and fix optimizers

- fix tag.zep file

- fix CssMinOptimizer and JsMinOptimizer
Merge pull request #1884 from zaets28rus/fix_build_2.0

[2.0.0] Fix errors by zephir compile and fix optimizers
Validation setLabels
UT for Validation Labels [ci skip]
UT for Validation Labels [ci skip]
Validation setLabels fix
Validation uniqueness fix
Fixed a typo
Phalcon\Debug\Dump display colorized var dump [ci skip]
Uniqueness, remove unused variables [ci skip]
Dump object private and protected attributes [ci skip]
Validator identical, compatibility with 1.x [ci skip]
Assets manager, add a javascript resource
Volt, compiledPath closure didn't return a valid string [ci skip]
Dump, do loop instead of while 1 [ci skip]
Validator file, proper order of conditions