Add strictness options

[jwodder]

parse_wheel_filename() should gain the following boolean options (all defaulting to False) for controlling how strict to be with wheel filename validation:

• strict_version — Require the version component to be valid under PEP 440
• strict_tags — Require each of the Python, ABI, and platform tag lists to be sorted (required by PEP 425)
  • In the future (cf. Look into the requirements for valid Python, ABI, and platform tags #12) this might also enable stricter requirements on tag formats than what wheel_filename currently enforces.
• strict — Enables all other strictness options, including others that may be added in the future