T14515 annotataions stream

[niden]

Hello!

• Type: bug fix
• Link to issue: [BUG]: in Phalcon\Annotations\Adapter\Stream::write() #14515

In raising this pull request, I confirm the following:

• I have read and understood the Contributing Guidelines
• I have checked that another pull request for this purpose does not exist
• I wrote some tests for this PR
• I have updated the relevant CHANGELOG
• I have created a PR for the documentation about this change

Fixed Phalcon\Annotations\Adapter\Stream::read and Phalcon\Annotations\Adapter\Stream::write to use serialize/unserialize vs. var_export

Thanks

[codecov]

Codecov Report

Merging #14517 into 4.0.x will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##            4.0.x   #14517      +/-   ##
==========================================
+ Coverage   67.69%   67.71%   +0.01%     
==========================================
  Files         482      482              
  Lines      111775   111796      +21     
==========================================
+ Hits        75670    75703      +33     
+ Misses      36105    36093      -12