Intake-erddap

What's Changed
* updated simplecache syntax by kthyng in https://github.com/axiom-data-science/intake-erddap/pull/55


**Full Changelog**: https://github.com/axiom-data-science/intake-erddap/compare/v0.3.1...v0.4.0

What's Changed
* small fix to "dropna" optional functionality by kthyng in https://github.com/axiom-data-science/intake-erddap/pull/54


**Full Changelog**: https://github.com/axiom-data-science/intake-erddap/compare/v0.3.0...v0.3.1

What's Changed
* changes so docs version is last release by kthyng in https://github.com/axiom-data-science/intake-erddap/pull/49
* build pdf by kthyng in https://github.com/axiom-data-science/intake-erddap/pull/50
* new tabledap source options by kthyng in https://github.com/axiom-data-science/intake-erddap/pull/52
* can now cache datasets using fsspec by kthyng in https://github.com/axiom-data-science/intake-erddap/pull/53


**Full Changelog**: https://github.com/axiom-data-science/intake-erddap/compare/v0.2.4...v0.3.0

This minor release contains the updates to error handling, which better align the manner of dealing with errors and client intuition about how those errors should be handled.

This minor release improves the package metadata for PyPI.

The primary focus of this release was getting the documentation to a level of quality fit for public consumption. During the development of the documentation a handful of improvements were made for quality of life for clients.

- Documentation significantly improved
- Adds new `query_type` keyword argument to the catalog constructor. [See docs for more details](https://intake-erddap.readthedocs.io/en/latest/api.html#intake-erddap-catalog) .