Not support float 32/64 from edgex

[worldmaomao]

Not supoort float32/64 from edgex.
In edgex, the float32/64 data is encoded into base64 or eNotation style.
kuiper should decode it.

Here is some logs:
time="2020-05-20T01:56:47Z" level=warning msg="No readings are processed for the event, so ignore it." file="edgex_source.go:162" rule=rule4
time="2020-05-20T01:56:48Z" level=warning msg="fail to get value for Holding_register_float64_40100: unkown value type: float64" file="edgex_source.go:130" rule=rule4
time="2020-05-20T01:56:48Z" level=warning msg="fail to get value for Holding_register_float32_40104: unkown value type: float32" file="edgex_source.go:130" rule=rule4

[jinfahua]

It has been supported in 0.3.2. What's your Kuiper version?

[worldmaomao]

I have created request pull(#273).
Please refer

[jinfahua]

Thanks for your PR, one comment in the PR #273. Could you please take a look?

[jinfahua]

Done & close the issue, released in 0.4.1.