Bump pyflakes from 1.1.0 to 2.1.1

[dependabot-preview]

Bumps pyflakes from 1.1.0 to 2.1.1.

Changelog

Sourced from pyflakes's changelog.

2.1.1 (2019-02-28) - Fix reported line number for type comment errors - Fix typing.overload check to only check imported names

2.1.0 (2019-01-23)

• Allow intentional assignment to variables named _
• Recognize __module__ as a valid name in class scope
• pyflakes.checker.Checker supports checking of partial ast trees
• Detect assign-before-use for local variables which shadow builtin names
• Detect invalid print syntax using >> operator
• Treat async for the same as a for loop for introducing variables
• Add detection for list concatenation in __all__
• Exempt @typing.overload from duplicate function declaration
• Importing a submodule of an as-aliased import-import is marked as used
• Report undefined names from __all__ as possibly coming from a * import
• Add support for changes in Python 3.8-dev
• Add support for PEP 563 (from __future__ import annotations)
• Include Python version and platform information in pyflakes --version
• Recognize __annotations__ as a valid magic global in Python 3.6+
• Mark names used in PEP 484 # type: ... comments as used
• Add check for use of is operator with str, bytes, and int literals

2.0.0 (2018-05-20)

• Drop support for EOL Python <2.7 and 3.2-3.3
• Check for unused exception binding in except: block
• Handle string literal type annotations
• Ignore redefinitions of _, unless originally defined by import
• Support __class__ without self in Python 3
• Issue an error for raise NotImplemented(...)

1.6.0 (2017-08-03)

• Process function scope variable annotations for used names
• Find Python files without extensions by their shebang

1.5.0 (2017-01-09)

• Enable support for PEP 526 annotated assignments

1.4.0 (2016-12-30):

• Change formatting of ImportStarMessage to be consistent with other errors
• Support PEP 498 "f-strings"

1.3.0 (2016-09-01):

• Fix PyPy2 Windows IntegrationTests
• Check for duplicate dictionary keys
• Fix TestMain tests on Windows
• Fix "continue" and "break" checks ignoring py3.5's "async for" loop

... (truncated)

Commits

• 6501af4 Release 2.1.1
• ba64624 Fix line number of comment syntax error message (#420)
• 2c29431 Fix typing.overload check to only check imported names (#423)
• 72bf8cc Fix appveyor build
• 4bc1f21 Write changelog and bump version for 2.1.0
• 65fdfad Fix regression with __all__ = [not, strings]
• 14f28ba Use file_tokens to better match flake8 api
• 357a2e3 Allow star args in type comments
• 7272b10 Add check for use of 'is' operator with str, bytes, and int literals
• 1f58890 Set the proper scope for async def
• 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.

---

Note: This repo was added to Dependabot recently, so you'll receive a maximum of 5 PRs for your first few update runs. Once an update run creates fewer than 5 PRs we'll remove that limit.

You can always request more updates by clicking Bump now in your Dependabot dashboard.

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 ignore this [patch|minor|major] version will close this PR and stop Dependabot creating any more for this minor/major 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)
• 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 #62.