docs: fix a few simple typos

[timgates42]

There are small typos in:

• docs/source/articles/creatingagameengineplugin.rst
• docs/source/articles/whatsinareplay.rst
• docs/source/tutorials/prettyprinter.rst
• examples/sc2autosave.py
• sc2reader/engine/engine.py
• sc2reader/events/game.py
• sc2reader/objects.py
• sc2reader/resources.py

Fixes:

• Should read aggregated rather than aggrated.
• Should read account rather than acount.
• Should read versatile rather than versitile.
• Should read unnecessary rather than unncessary.
• Should read targeting rather than targetting.
• Should read substitution rather than substition.
• Should read requirements rather than requirments.

Closes #145

[cclauss]

Conflicting files: sc2reader/engine/engine.py

[timgates42]

Thanks @cclauss