nbdev_new pins on major+minor version of nbdev-template

[seeM]

Since every version of nbdev uses latest nbdev-template, we can't make any breaking changes in nbdev-template. I propose that nbdev_new pins the major+minor version of nbdev-template and that nbdev-template bumps minor version on breaking changes.

Example

Implementing #1083 would be simpler with this change.

Currently, we can implement it by updating the default in _apply_defaults and having nbdev_new move a known list of files (*.ipynb, *.css) to cfg.nbs_path.

We wouldn't have to keep that list in our code if we could move those files into a new sub-dir of nbdev-template, but that would break nbdev_new for prior versions of nbdev.

cc @hamelsmu @jph00

[jph00]

Message ID: ***@***.***>Sounds good to me!

[hamelsmu]

sorry commented on the wrong issue

[seeM]

Closing. #1103 is a better solution to the underlying problem