Bump lxml from 3.8.0 to 4.4.1

[dependabot-preview]

Bumps lxml from 3.8.0 to 4.4.1.

Changelog

Sourced from lxml's changelog.

4.4.1 (2019-08-11)

Bugs fixed

• LP#1838252: The order of an OrderedDict was lost in 4.4.0 when passing it as
  attrib mapping during element creation.

• LP#1838521: The package metadata now lists the supported Python versions.

4.4.0 (2019-07-27)

Features added

• Element.clear() accepts a new keyword argument keep_tail=True to clear
  everything but the tail text. This is helpful in some document-style use cases
  and for clearing the current element in iterparse() and pull parsing.

• When creating attributes or namespaces from a dict in Python 3.6+, lxml now
  preserves the original insertion order of that dict, instead of always sorting
  the items by name. A similar change was made for ElementTree in CPython 3.8.
  See https://bugs.python.org/issue34160

• Integer elements in lxml.objectify implement the __index__() special method.

• GH#269: Read-only elements in XSLT were missing the nsmap property.
  Original patch by Jan Pazdziora.

• ElementInclude can now restrict the maximum inclusion depth via a max_depth
  argument to prevent content explosion. It is limited to 6 by default.

• The target object of the XMLParser can have start_ns() and end_ns()
  callback methods to listen to namespace declarations.

• The TreeBuilder has new arguments comment_factory and pi_factory to
  pass factories for creating comments and processing instructions, as well as
  flag arguments insert_comments and insert_pis to discard them from the
  tree when set to false.

• A C14N 2.0 <https://www.w3.org/TR/xml-c14n2/>_ implementation was added as
  etree.canonicalize(), a corresponding C14NWriterTarget class, and
  a c14n2 serialisation method.

Bugs fixed

... (truncated)

Commits

• 1781e48 Prepare release of lxml 4.4.1.
• 766f6d0 Point link to "main.txt" directly to the file instead of the website (GH-285)
• 19ac07f Add comment to help with maintenance.
• 9fa1b9c Backed out changeset 7ee62a9b3b64
• 094737c Remove redundant Python version specification (classifiers should be enough).
• e65a38a Fill python_requires with proper metadata (GH-283)
• 548ce07 include also world.txt with sdist (GH-284)
• 9eec135 LP#1838252: Keep the order provided by an OrderedDict that gets passed as att...
• 9126731 Modernise some code.
• 929948d Fix wheel build by excluding Py3.4.
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)
• @dependabot use these labels will set the current labels as the default for future PRs for this repo and language
• @dependabot use these reviewers will set the current reviewers as the default for future PRs for this repo and language
• @dependabot use these assignees will set the current assignees as the default for future PRs for this repo and language
• @dependabot use this milestone will set the current milestone as the default for future PRs for this repo and language
• @dependabot badge me will comment on this PR with code to add a "Dependabot enabled" badge to your readme

Additionally, you can set the following in your Dependabot dashboard:

• Update frequency (including time of day and day of week)
• Automerge options (never/patch/minor, and dev/runtime dependencies)
• Pull request limits (per update run and/or open at any time)
• Out-of-range updates (receive only lockfile updates, if desired)
• Security updates (receive only security updates, if desired)

Finally, you can contact us by mentioning @dependabot.

[dependabot-preview]

Superseded by #89.