Aggregation only works for integer values

[sammy007]

I have implemented my own probe which is inherited from spiral and divides value by time_span hence returned value is float, I configured an aggregation and see no values computed.
After some research I found that there is a check for is_integer in aggr_acc([{D,V}|T], Acc) function. After I changed it to is_number it works. Do you think it worth fixing?

exometer_core/src/exometer.erl

Line 841 in 588da23

if is_integer(V) ->

[tolbrino]

I think that should be an option. Feel free to submit the PR.