encoding/jsonschema: non-string regular expressions should error
The error from `Value.String` was being ignored. Use `strValue` instead,
which gives an error if the value is not a string.
Signed-off-by: Roger Peppe <rogpeppe@gmail.com>
Change-Id: If599225bd9f3e2f5db6db3153dd0a40c01393504
Reviewed-on: https://review.gerrithub.io/c/cue-lang/cue/+/1201124
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Unity-Result: CUE porcuepine <cue.porcuepine@gmail.com>
TryBot-Result: CUEcueckoo <cueckoo@cuelang.org>