Upgrade x/sys and quantile to work with Go 1.18

[Groxx]

Builds with 1.18 are currently failing with numerous errors like:

> make bins
go build -o .build/dummy internal/cmd/dummy/dummy.go
# golang.org/x/sys/unix
../../../pkg/mod/golang.org/x/sys@v0.0.0-20200930185726-fdedc70b468f/unix/syscall_darwin.1_13.go:29:3: //go:linkname must refer to declared function or variable
../../../pkg/mod/golang.org/x/sys@v0.0.0-20200930185726-fdedc70b468f/unix/zsyscall_darwin_amd64.1_13.go:27:3: //go:linkname must refer to declared function or variable

This is pretty easily addressed with go get -u go.lang.org/x/sys, which (plus make build to verify) is all this commit would contain...

... but github.com/streadway/quantile was using a import ".", which apparently Go 1.18 disallows for modules. Which breaks go mod tidy rather awkwardly. TIL. Now that https://github.com/streadway/quantile/pull/8 is merged though, the new master works, so that has been updated as well.

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Previously:

It would probably be good to upgrade other things and do a go mod tidy, but unfortunately that is currently failing with:

go.uber.org/cadence/internal imports
    go.uber.org/yarpc imports
    github.com/uber/tchannel-go tested by
    github.com/uber/tchannel-go.test imports
    github.com/streadway/quantile tested by
    github.com/streadway/quantile.test imports
    .: "." is relative, but relative import paths are not supported in module mode

I've opened a PR for the core fix: https://github.com/streadway/quantile/pull/8 And I've asked yarpc/tchannel internally to see if they can address this as well, as I'm really not sure how long that will take to merge.

In the meantime, as far as I can tell, we just can't do go mod tidy. Updating / installing / etc of dependencies works fine.

[coveralls]

Pull Request Test Coverage Report for Build 1175e832-e9e9-4c97-864d-74cc1082a4d7

• 0 of 5 (0.0%) changed or added relevant lines in 3 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.07%) to 63.751%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
internal/compatibility/adapter.go	0	1	0.0%
internal/common/auth/service_wrapper.go	0	2	0.0%
internal/compatibility/proto/request.go	0	2	0.0%
<!--	Total:	0	5	0.0%	-->

Files with Coverage Reduction	New Missed Lines	%
internal/internal_task_pollers.go	2	81.64%
<!--	Total:	2		-->

Totals
Change from base Build 2db1895d-7a68-425d-b16f-1dd9cce48c62:	0.07%
Covered Lines:	12385
Relevant Lines:	19427

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💛 - Coveralls