Nbinteract

**JS**

- Enable users to specify notebook server instead of Binder server through the
`nbUrl` config option when initializing the `NbInteract` object
(https://github.com/SamLau95/nbinteract/pull/102).

**Python**

Bug fixes:

- Fix bug in initialization script for repos with dashes in the name.

**JS**

Features:

- Bundle size reduced to 1.23 MB unzipped (https://github.com/SamLau95/nbinteract/commit/cdb053f0018bdda0f4554ce5f0840b719a3af05e).

**Python**

Bug fixes:

- Require jinja2 version to be at least 2.10

**JS**

Bug fixes:

- Ensure top level button gets removed when widgets render (https://github.com/SamLau95/nbinteract/pull/92)

**Python**

Features:

- When publishing, the branch name of the spec is now optional (defaults to
`master`) (https://github.com/SamLau95/nbinteract/pull/91).

**JS**

Bug fixes:

- Correctly remove top level widget button (https://github.com/SamLau95/nbinteract/commit/a3658f8105f01c1e63e0e719944a99afc58dac51)

**Python**

Features:

- Add layout flags (https://github.com/SamLau95/nbinteract/pull/88)

**JS**

Changes:

- Stop supporting Gitbook plugin (https://github.com/SamLau95/nbinteract/pull/83)

**Python**

Changes:

- Rename `gitbook` template to `plain` (https://github.com/SamLau95/nbinteract/pull/83)

Bug fixes:

- Fixes unicode issue on Windows (https://github.com/SamLau95/nbinteract/pull/84)
- Fixes spec issue in publish method (https://github.com/SamLau95/nbinteract/pull/85)