Json transformation loses data

[davilimap]

Copied from: microsoft/slow-cheetah#107

Trying to replace whole file which contains date with zero'es as milliseconds results in transformed file losing those zero'es

Transformation file:
{ "value": "2017-12-20T20:10:00.0000000" }

Transformed file:
{ "value": "2017-12-20T20:10:00" }

Expected transformed file:
{ "value": "2017-12-20T20:10:00.0000000" }