kit/metrics/cloudwatch2: fails to build

[h8liu]

# github.com/go-kit/kit/metrics/cloudwatch2
src/github.com/go-kit/kit/metrics/cloudwatch2/cloudwatch2.go:169:22: not enough arguments in call to req.Send
	have ()
	want (context.Context)

Break found by gopkgs.io:
https://gopkgs.io/builds/20190406-041800-2e1199d6

[peterbourgon]

@nelz9999 Can you look at this one?

[eclipseo]

Related to this commit I presume: aws/aws-sdk-go-v2@efe43a4

[nelz9999]

👀

[PaulLiang1]

Is there is release for this one?
The current cloudwatch2 is not useable.

[peterbourgon]

It's fixed in master.