- update to version 1.5.0:
* Enable support for PEP 526 annotated assignments

- update to version 1.4.0:
* Change formatting of ImportStarMessage to be consistent with
other errors
* Support PEP 498 "f-strings"
- update to version 1.3.0:
* 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
- update to version 1.2.3:
* Fix TypeError when processing relative imports

- update to version 1.2.2:
* Avoid traceback when exception is del-ed in except
- update to version 1.2.1:
* Fix false RedefinedWhileUnesed for submodule imports
- update to version 1.2.0:
* Warn against reusing exception names after the except: block on
Python 3
* Improve the error messages for imports
- update to version 1.1.0:
* main() can now accept arguments
* the matrix-multiplication operator (@) is now supported
* imports from __future__ are checked for validity
* fixes to doctest scope testing
* asserts against a tuple (which are always true) now emits a warning
* "import *" not at the module level on python3 emits a warning