uint64 returns invalid number from Influx v1.8

[diamondburned]

Marshaling a field with type uint64 will trigger an "invalid number" error.

This seems to come from these lines: https://github.com/influxdata/influxdb1-client/blob/master/models/points.go#L2354-L2356

A solution would be to cast this to int64 similarly to the cases underneath it.

Additional information

Shell log:

> INSERT convert,hostname=hanaharu wrote_bytes=2363546 1593054632437
> INSERT convert,hostname=hanaharu wrote_bytes=2363546u 1593054632437
ERR: {"error":"unable to parse 'convert,hostname=hanaharu wrote_bytes=2363546u 1593054632437': invalid number"}

InfluxDB v1.8 Data Types for the line protocol reference, which doesn't show unsigned types.

[magicdvd]

same issue