v2.6.3

• Added If.is_sys_guard and If.is_typing_guard helper methods

• Fix a bad inferenece type for yield values inside of a derived class.

  Closes #1090

• Fix a crash when the node is a 'Module' in the brain builtin inference

  Closes pylint-dev/pylint#4671

• Fix issues when inferring match variables

  Closes pylint-dev/pylint#4685

• Fix lookup for nested non-function scopes

• Fix issue that TypedDict instance wasn't callable.

  Closes pylint-dev/pylint#4715

• Add dependency on setuptools and a guard to prevent related exceptions.