Dictionary format of author in package.json not supported

This is a minor issue, but I discovered that package.json files (for custom Dash component projects) that uses author field on the more "json-native format"

{
  "name" : "Barney Rubble",
  "email" : "b@rubble.com",
  "url" : "http://barnyrubble.tumblr.com/"
}

instead of

{
  "author": "Barney Rubble <b@rubble.com> (http://barnyrubble.tumblr.com/)"
}

fails with

Traceback (most recent call last):
  File "[...]/bin/dash-generate-components", line 11, in <module>
    load_entry_point('dash==1.19.0', 'console_scripts', 'dash-generate-components')()
  File "[...]/site-packages/dash/development/component_generator.py", line 213, in cli
    jlprefix=args.jl_prefix,
  File "[...]/site-packages/dash/development/component_generator.py", line 137, in generate_components
    rsuggests,
  File "[...]/site-packages/dash/development/_r_components_generation.py", line 777, in generate_exports
    has_wildcards,
  File "[...]/site-packages/dash/development/_r_components_generation.py", line 625, in generate_rpkg
    package_author_name = package_author.split(" <")[0]
AttributeError: 'collections.OrderedDict' object has no attribute 'split'

Related minor thing is that e-mail is also optional from npm's package.json side, but required by https://github.com/plotly/dash/blob/e8ac94919105a91c76a966c21aca2ec7b0297e22/dash/development/_r_components_generation.py#L626

EDIT: Which by looking at the code I see might fail also if the author string includes homepage, due to [:-1] filtering only.

Start at dash/development/_r_components_generation.py, especially generate_rpkg and the dash-generate-components entry point shown in the traceback. Reproduce the failure with a package.json using the dictionary author form, then verify generation also handles the optional email or homepage fields without raising the reported error.