Sphinxcontrib-jupyter

This is a minor release to make writing templates that support `next` and `prev` metadata easier to write without having multiple object types. It relies on `metadata` or `no metadata`.

- FIX: Simply interface with template layer for next and prev metadata in notebooks [\333](https://github.com/QuantEcon/sphinxcontrib-jupyter/pull/333) ([mmcky](https://github.com/mmcky))

Minor update to 0.5.8 that fixes an edge case where titles are composed of text and other element types such as index. This parses the children list and extracts text items only.

This release includes a minor update to `next` and `prev` metadata support (introduced in `0.5.7`) to enable a filter in `conf.py` for documents that are not to be written to the `nb` metadata.

**Usage:**

python
jupyter_nextprev_ignore = ["404, "search"]


- ENH: Add support for exclusion of Next and Previous metadata in conf.py [\330](https://github.com/QuantEcon/sphinxcontrib-jupyter/pull/330) ([mmcky](https://github.com/mmcky))

This release includes metadata for `next` and `previous` documents

- ENH: add next and prev document metadata to notebook meta [\329](https://github.com/QuantEcon/sphinxcontrib-jupyter/pull/329) ([mmcky](https://github.com/mmcky))

The metadata is provided at the notebook level in `nb.metadata` and is in the following format:


"next_doc": {
"link": str(docname),
"title": str(title)
},


with metadata keys: `next_doc` and `prev_doc`.

If a `next`/`previous` document does **not** exist there is no metadata included for that item.

This minor release includes:

- [ENH] Remove early version requirements for dask [\328](https://github.com/QuantEcon/sphinxcontrib-jupyter/pull/328) ([mmcky](https://github.com/mmcky))
- [TEST] add sphinx=3.0.3 testing [\327](https://github.com/QuantEcon/sphinxcontrib-jupyter/pull/327) ([mmcky](https://github.com/mmcky))

This release includes the following bug fixes and improvements:

- [BUG] check node\['ids'\] before accessing [\325](https://github.com/QuantEcon/sphinxcontrib-jupyter/pull/325) ([AakashGfude](https://github.com/AakashGfude))
- [BUG] bullets array pop in enumerated list. [\323](https://github.com/QuantEcon/sphinxcontrib-jupyter/pull/323) ([AakashGfude](https://github.com/AakashGfude))
- [ENH] Throwing an exit code of 1 when there is an error in coverage [\321](https://github.com/QuantEcon/sphinxcontrib-jupyter/pull/321) ([AakashGfude](https://github.com/AakashGfude))
- [ENH] Added protective code to support more versions of YAML package [\320](https://github.com/QuantEcon/sphinxcontrib-jupyter/pull/320) ([Lightslayer](https://github.com/Lightslayer))
- Fixing versions of dask to prevent code syntax issues [\314](https://github.com/QuantEcon/sphinxcontrib-jupyter/pull/314) ([AakashGfude](https://github.com/AakashGfude))

**Note:** Python Version 2.7 is no longer tested as of this release. Python=3.7 and 3.8 will be tested.