doc8 triggers DeprecationWarning

[Lex Li]

/home/quent/.local/share/virtualenvs/wiki-BPmjEsJJ/lib/python3.7/site-packages/doc8/main.py:90: DeprecationWarning: This method will be removed in future versions. Use 'parser.read_file()' instead.
  parser.readfp(fh, filename=fn)
Scanning...
Validating...
========
Total files scanned = 1
Total files ignored = 0
Total accumulated errors = 0
Detailed error counts:
    - CheckCarriageReturn = 0
    - CheckIndentationNoTab = 0
    - CheckMaxLineLength = 0
    - CheckNewlineEndOfFile = 0
    - CheckTrailingWhitespace = 0
    - CheckValidity = 0