* master: (23 commits)
  Make return type of open() more precise (python#3477)
  Add test cases that delete a file during incremental checking (python#3461)
  Parse each format-string component separately (python#3390)
  Don't warn about returning Any if it is a proper subtype of the return type (python#3473)
  Add __setattr__ support (python#3451)
  Remove bundled lib-typing (python#3337)
  Move version of extensions to post-release (python#3348)
  Fix None slice bounds with strict-optional (python#3445)
  Allow NewType subclassing NewType. (python#3465)
  Add console scripts (python#3074)
  Fix 'variance' label.
  Change label for variance section to just 'variance' (python#3429)
  Better error message for invalid package names passed to mypy (python#3447)
  Fix last character cut in html-report if file does not end with newline (python#3466)
  Print pytest output as it happens (python#3463)
  Add mypy roadmap (python#3460)
  Add flag to avoid interpreting arguments with a default of None as Optional (python#3248)
  Add type checking plugin support for functions (python#3299)
  Mismatch of inferred type and return type note (python#3428)
  Sync typeshed (python#3449)
  ...