Criteria::limit() now takes 'offset' as an integer.

[SidRoberts]

Hello!

• Type: code quality
• Link to issue:

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 updated the CHANGELOG

Small description of change:

Thanks

[codecov]

Codecov Report

Merging #13977 into 4.0.x will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##            4.0.x   #13977      +/-   ##
==========================================
- Coverage   67.88%   67.88%   -0.01%     
==========================================
  Files         469      469              
  Lines       94314    94316       +2     
==========================================
- Hits        64027    64024       -3     
- Misses      30287    30292       +5

Impacted Files	Coverage Δ
ext/phalcon/mvc/model/criteria.zep.c	34% <0%> (-0.39%)	⬇️

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[niden]

@SidRoberts mind rebasing please?

[niden]

Thank you @SidRoberts