Transform "preset" value before passing to "standard-version" Changelog executor

[psamusev]

"standart-version" library that is using to generate the changelog has value of the "preset" property other than StandartVersionPreset type

For example defaults has it as exeuction of the require.resolve() and as a result it produce path to that module in node_module folder rathen than value of StandartVersionPreset. It leads to the preset-loader problem in changelog generation

As you may notice the result of the preset-loader will be library preset value (that's just a plain string according to StandartVersionPreset) because it won't meet the defaultPreset values of the "standart-version" and we will not go inside the defalut condition block. Due to this we are not able to change the conventional-specs(related issue #434)) of the 'conventionalcommits' preset generator.

Expecte behavior - before using of the standart-version changelog generator we need transform preset either to the default of "standart-version" (and in this case we may have possibility to change the conventional-specs (related issue #434) or consider preset as object with conventional-spec configuration