T14464 cast on arr collection

[niden]

Hello!

• Type: enhancement
• Link to issue: [NFR]: Add casting to Arr::get and Collection::get #14464

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

Added cast parameter to Phalcon\Collection::get and Phalcon\Helper\Arr::get allowing developers to cast the result returned to the type they want to.

Thanks

[niden]

cc @ruudboon @sergeyklay

[codecov]

Codecov Report

Merging #14465 into 4.0.x will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##            4.0.x   #14465      +/-   ##
==========================================
- Coverage   67.67%   67.66%   -0.01%     
==========================================
  Files         482      482              
  Lines      111229   111331     +102     
==========================================
+ Hits        75275    75337      +62     
- Misses      35954    35994      +40

[niden]

@ruudboon settype will return a notice if the wrong type is passed so we are OK on that.