Update pdoc3 requirement from ~=0.5.4 to ~=0.6.1

[dependabot-preview]

Updates the requirements on pdoc3 to permit the latest version.

Changelog

Sourced from pdoc3's changelog.

0.6.1 (2019-05-05)

• Minor maintenance release.

0.6.0 (2019-05-03)

• New support for PEP 484 Python type annotations.
• Class __init__ methods are no longer documented separately.
  Instead, class docstring now contains __init__ method's docstring,
  and class definition line now shows __init__ parameters.
  This is in line with Sphinx / Python stdlib documentation.
• PDF docs generation via Markdown, ingestible by various
  Markdown-to-PDF converters.
• New module import mechanism with improved support for
  namespace packages.
• CLI changes:
  • New --config switch for easier setting of config.mako tunables.
  • Deprecated switches in favor of new/standard ones:
    • --overwrite → -f, --force
    • --html-dir → -o, --output-dir
    • --html-no-source, --external-links and --link-prefix are
      removed in favor of new tunables settable with --config.
  • --output-dir without --html outputs a tree of raw Markdown files.
  • The semantics of module specified as filesystem path has changed:
    before the full relative path was used to construct the python module
    path, now only the basename is.
• Bugfixes regarding raw URLs and numpydoc transformations.

0.5.4 (2019-04-21)

• Bugfixes:
  • Added support for metaclass subclasses.
  • Fix pdoc.Function.params() error in case when keyword-only
    parameters have no default values.
  • Don't expand os.environ parameter default value as exposing it
    is a security issue.

0.5.3 (2019-03-05)

• Only close standard input if --close-stdin is used. This flips
  the previous (hopefully rarely required) default.
• Fix backslashes in relative Doc.url() on Windos.
• New support for .. include:: reST directive that includes
  verbatim content from another file.
• Dev web server (--http) fixes:
  • Unify --http and non---http behavior by always adding
    cwd to sys.path.
  • Fix favicon.ico errors in --http mode.
• HTML template:
  • Make TOC reference lists two- or three-column only if enough room for it.

... (truncated)

Commits

• 0b1561b MNT: Remove stale setup.py author= field
• 0213ad5 DOC: Update README.md, mention type hints
• db99677 MNT: Update changelog for 0.6.0
• cbc829b Merge pull request #62 from kernc/new_import
• 54fc6d0 BUG: Resolve .. include:: directive already in Doc.docstring
• 05f8378 MNT: Add release dates to changelog
• a3d0f25 BUG: Don't put non-str in sys.path
• 0f5f96e REF: Only reload modules when in --http mode
• facbb6f API: New better module import / support for namespace packages
• 82406a9 TST: Init class variables in setUpClass method
• Additional commits viewable in compare view

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