Convert classes to dataclass

[BurnySc2]

• Removal of ._proto attribute for many classes (Cost, Ramp, PowerSource, PsionicMatrix, RallyTarget, UnitOrder ), protobuf message will be parsed and converted to dataclass instead
• Lazy evaluation of properties should give speed up if not accessed No longer done because of the dataclasses-undo
• Removal of deprecated Point2.is_closer_than() and Point2.is_further_than()
• Renaming of keys of protobuf message dicts should prevent clashing with attribute names, but slows down the code slightly
• Removal of Units.select()

[codecov-commenter]

Codecov Report

Merging #148 (de83c48) into develop (488e750) will decrease coverage by 20.21%. The diff coverage is 74.38%.

:exclamation: Current head de83c48 differs from pull request most recent head 4bf60b9. Consider uploading reports for the commit 4bf60b9 to get more accurate results

@@             Coverage Diff              @@
##           develop     #148       +/-   ##
============================================
- Coverage    80.38%   60.17%   -20.22%     
============================================
  Files           93      107       +14     
  Lines        12655    13976     +1321     
============================================
- Hits         10173     8410     -1763     
- Misses        2482     5566     +3084     

Impacted Files	Coverage Δ
generate_dicts_from_data_json.py	0.00% <ø> (ø)
sc2/constants.py	98.63% <ø> (-1.37%)	:arrow_down:
sc2/dicts/generic_redirect_abilities.py	100.00% <ø> (ø)
sc2/dicts/unit_abilities.py	0.00% <ø> (ø)
sc2/dicts/unit_research_abilities.py	100.00% <ø> (ø)
sc2/dicts/unit_tech_alias.py	0.00% <ø> (ø)
sc2/dicts/unit_train_build_abilities.py	100.00% <ø> (ø)
sc2/dicts/unit_trained_from.py	100.00% <ø> (ø)
sc2/dicts/unit_unit_alias.py	0.00% <ø> (ø)
sc2/dicts/upgrade_researched_from.py	100.00% <ø> (ø)
... and 80 more

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