* Add volume flow rate conversions
* Add missing translations
* Adjust liter unit and add gallons per minute
* Adjust to min instead of m for minutes
* Add matching class for number
* Add some tests for number and sensor platform
* Add deprecated constants
* Add explicit list of flow rate for check
This reverts commit 105171af31e5b5d70cbc0b9c18fb8ef2d24caffa.