internal/cueversion: bump for the upcoming v0.17 release cycle
I should have done this last week after the v0.16.0 release, but forgot.
Signed-off-by: Daniel Martí <mvdan@mvdan.cc>
Change-Id: I1ffffee9b5f17072fd8afc2e9bd2b4087cc767d5
Reviewed-on: https://cue.gerrithub.io/c/cue-lang/cue/+/1233624
Reviewed-by: Paul Jolly <paul@myitcv.io>
Unity-Result: CUE porcuepine <cue.porcuepine@gmail.com>
TryBot-Result: CUEcueckoo <cueckoo@cuelang.org>