test: use `--require=trace...` is mocha.opts
test: use `--require=trace...` is mocha.opts

... to prevent `trace-and-clarify-if-possible`
from getting parsed as node-argument.

related to mochajs/mocha#3761

bootprint/customize-write-files,nknapp/customize-write-files,bootprint/customize-write-files,nknapp/customize-write-files