$expr does not support all aggr expressions. How to continue? #13
Description
I found out that this library does not support all aggregation expressions currently supported in Mongo. Now the question arises is this library maintained still? As I fixed it in this sandbox.
The following expressions are added to the agg object:
EQUAL
NOT_EQUAL
LESS_THAN
LESS_THAN_EQUALS
MORE_THAN
MORE_THAN_EQUALS