v2.9.1

• NodeNG.frame() and NodeNG.statement() will start raising ParentMissingError
  instead of AttributeError in astroid 3.0. This behaviour can already be triggered
  by passing future=True to a frame() or statement() call.

• Prefer the module loader get_source() method in AstroidBuilder's
  module_build() when possible to avoid assumptions about source
  code being available on a filesystem. Otherwise the source cannot
  be found and application behavior changes when running within an
  embedded hermetic interpreter environment (pyoxidizer, etc.).

• Require Python 3.6.2 to use astroid.

• Removed custom distutils handling for resolving paths to submodules.

  Ref #1321

• Fix deque.insert() signature in collections brain.

  Closes #1260

• Fix Module nodes not having a col_offset, end_lineno, and end_col_offset
  attributes.

• Fix typing and update explanation for Arguments.args being None.

• Fix crash if a variable named type is subscripted in a generator expression.

  Closes pylint-dev/pylint#5461

• Enable inference of dataclass import from marshmallow_dataclass.
  This allows the dataclasses brain to recognize dataclasses annotated by marshmallow_dataclass.

• Resolve symlinks in the import path
  Fixes inference error when the import path includes symlinks (e.g. Python
  installed on macOS via Homebrew).

  Closes #823
  Closes pylint-dev/pylint#3499
  Closes pylint-dev/pylint#4302
  Closes pylint-dev/pylint#4798
  Closes pylint-dev/pylint#5081