Fix #1508 devtools version showing phalcon version instead for 4.0.x

[Ultimater]

Hello!

• Type: bug fix
• Link to issue: https://github.com/phalcon/phalcon-devtools/issues/1508

In raising this pull request, I confirm the following (please check boxes):

• [x] I have read and understood the Contributing Guidelines
• [x] I have checked that another pull request for this purpose does not exist
• [ ] I wrote some tests for this PR

Small description of change:

4.0.x uses _getVersion() instead of getVersion() when extending Phacon\Version, this results in devtools reporting back the wrong version of devtools back to the user as though devtools and phalcon have the same version when they really have different versions.

Thanks

[codecov[bot]]

Codecov Report

Merging #1512 (af6158e) into 4.0.x (d6f7721) will not change coverage. The diff coverage is 0.00%.

@@          Coverage Diff          @@
##           4.0.x   #1512   +/-   ##
=====================================
  Coverage   3.29%   3.29%           
=====================================
  Files        112     112           
  Lines       5103    5103           
=====================================
  Hits         168     168           
  Misses      4935    4935