This commit creates a new ConfigAdapter used in vector maps instantiations.
This adapter generates a new sql query for ONE SINGLE LAYER (carto-vl currently only supports one layer per mvt)
where the date columns are wrapped into a epoch using the `date_part` function.
Due this mvt files are smaller since we use numbers instead strings to represent dates, this is also faster in carto-gl
where we interpolate linearly between 0 and 1 to create animations.
Notice we should add a parameter to make this transformation optional.
We also should take into account the epoch precission.
Daniel García Aubert