unicode: support version 10

[nightlyone]

see http://blog.unicode.org/2017/06/announcing-unicode-standard-version-100.html for the announcement and further information about what changed.

What version of Go are you using (go version)?

go version go1.9rc2 linux/amd64

What operating system and processor architecture are you using (go env)?

GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/ioe/sources/go"
GORACE=""
GOROOT="/usr/local/go"
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/user/1000/go-build705652549=/tmp/go-build -gno-record-gcc-switches"
CXX="g++"
CGO_ENABLED="1"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"

What did you do?

println(unicode.Version)

as in https://play.golang.org/p/k69zvpQ97S

What did you expect to see?

10.0.0

What did you see instead?

9.0.0

[dsnet]

\cc @mpvl

[Manishearth]

Is there anything that needs to be done here aside from updating the tables? It seems like the IDNA changes aren't relevant to Go, and Go doesn't do collation, so it should just be a matter of updating the tables.

I did this before realizing the bug was already assigned, but here's the commit in case anyone wants it: Manishearth@dcb8a6f

[nightlyone]

@Manishearth The repositories under https://godoc.org/golang.org/x/text might be affected, too. So I hope @mpvl will sort this out or can at least provide a todo list for interested contributors.

[mpvl]

net/http uses http2 uses idna. It is vendored so it matters.

The IDNA change was quite substantial so 1.10 it will be.

[gopherbot]

Change https://golang.org/cl/63791 mentions this issue: x/text: Unicode 10 upgrade

[gopherbot]

Change https://golang.org/cl/63951 mentions this issue: idna: updated to Unicode 10.0.0

[gopherbot]

Change https://golang.org/cl/63953 mentions this issue: unicode: update to Unicode 10.0.0