* new doctype UOM category
* new doctype UOM Conversion Factor
* bootstrap json data for uom conversions
* uom conversion in item
* Patch to add all conversions and categories
* Fetch conversions multi-way
* fix codacy
* Rebase with develop
* [minor] Fix
* Add a test case
* Improvise as per review comment
* Add json data for UOMs
* Commonify function and call from patch
* Update uom_conversion_data.py
