Making "--no-dev-dependencies` the default

[dpc]

After noticing that --no-dev-dependencies did not work, I fixed it in 73e1ac6 and then decided to make it the default in 1ba1e53 .

In the past I thought "well of course as a reviewer you want to know about ALL the dependencies", but from the perspective of time, I think it's making things even more intimidating, since dev crates like criterion etc. bring in a lot of own dependencies and just blow up the dependency tree one has to look through.

And in the end the dev dependencies affect much fewer people.

If anyone wants to verify dev dependencies they can now do cargo crev verify --dev-depencies which is shorter to type and avoids a negation.