[ImgBot] Optimize images

[cooljeanius]

ImgBot reduces image file sizes losslessly with ImageMagick, Svgo, and MozJpeg. Here are its results for this repository:

*Total -- 482.05kb -> 393.91kb (18.28%)

/images/units/imps/ixthala-fire-dancer.png -- 3.69kb -> 1.41kb (61.87%)
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/images/units/imps/ixthala-fire-dancer-defend2.png -- 3.25kb -> 1.31kb (59.63%)
/images/units/demons/gatekeeper-blood.png -- 39.30kb -> 16.23kb (58.7%)
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/images/campaign-icon-episode1.png -- 3.68kb -> 1.61kb (56.3%)
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/images/units/elves-wood/anlinde-avatar.png -- 3.41kb -> 1.51kb (55.81%)
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/images/units/faeries/naiad.png -- 2.94kb -> 1.39kb (52.74%)
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/images/icons/abscond.png -- 8.56kb -> 6.13kb (28.43%)
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/images/units/faeries/elynia-e3-defense-2.png -- 1.22kb -> 1.14kb (6.57%)
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/images/units/faeries/elynia-defense.png -- 1.32kb -> 1.24kb (6.27%)
/images/units/elves-quenoth/outrider-defend1.png -- 2.08kb -> 1.95kb (6.26%)
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/images/units/faeries/elynia-zzz-1.png -- 1.14kb -> 1.08kb (5.81%)
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/images/units/shaxthal/master-of-darkness+unmasked.png -- 1.08kb -> 1.02kb (5.61%)
/images/units/faeries/elynia-zzz-2.png -- 1.49kb -> 1.41kb (5.58%)
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/images/units/elves-quenoth/marksman.png -- 2.15kb -> 2.03kb (5.37%)
/images/units/elves-quenoth/champion-defend2.png -- 1.22kb -> 1.16kb (5.35%)
/images/units/elves-quenoth/sun_sylph/sun-sylph-fly1.png -- 1.46kb -> 1.38kb (5.29%)
/images/units/elves-quenoth/sun_sylph/sun-sylph-fly6.png -- 1.45kb -> 1.38kb (5.25%)
/images/units/elves-quenoth/pathfinder-defend2.png -- 1.72kb -> 1.63kb (5.11%)
/images/units/faeries/elynia-attack-melee-7.png -- 1.37kb -> 1.30kb (5%)
/images/units/elves-quenoth/sun_sylph/sun-sylph-stand.png -- 1.47kb -> 1.40kb (4.98%)
/images/units/elves-quenoth/sun_sylph/sun-sylph-fly2.png -- 1.45kb -> 1.38kb (4.97%)
/images/units/faeries/nightshade-fire-f.png -- 1.31kb -> 1.24kb (4.94%)
/images/units/elves-quenoth/sun_singer/sun-singer-heal-1.png -- 1.11kb -> 1.05kb (4.93%)
/images/units/elves-quenoth/druid.png -- 1.22kb -> 1.16kb (4.89%)
/images/units/elves-quenoth/sun_singer/sun-singer-heal-6.png -- 1.18kb -> 1.12kb (4.88%)
/images/units/demons/hellbent-tide.png -- 1.54kb -> 1.46kb (4.83%)
/images/units/elves-quenoth/sun_sylph/sun-sylph-fly-defend2.png -- 1.26kb -> 1.20kb (4.82%)
/images/units/elves-quenoth/pathfinder-defend1.png -- 1.80kb -> 1.72kb (4.77%)
/images/units/elves-quenoth/sun_singer/sun-singer.png -- 1.13kb -> 1.08kb (4.74%)
/images/units/elves-quenoth/pathfinder.png -- 1.82kb -> 1.74kb (4.72%)
/images/units/elves-quenoth/ranger-defend2.png -- 1.27kb -> 1.21kb (4.7%)
/images/units/shaxthal/master-of-darkness.png -- 1.04kb -> 0.99kb (4.69%)
/images/units/elves-quenoth/ranger-defend1.png -- 1.40kb -> 1.34kb (4.67%)
/images/units/elves-quenoth/fighter-attack1.png -- 1.07kb -> 1.02kb (4.64%)
/images/units/elves-quenoth/sun_sylph/sun-sylph-fly-defend1.png -- 1.36kb -> 1.30kb (4.6%)
/images/units/faeries/eventide-dancer.png -- 1.21kb -> 1.16kb (4.59%)
/images/units/shaxthal/warlord-elyssa-f-illusion-3.png -- 1.20kb -> 1.14kb (4.56%)
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/images/units/faeries/dusk.png -- 1.10kb -> 1.05kb (4.53%)
/images/units/faeries/nightshade-fire.png -- 1.19kb -> 1.13kb (4.52%)
/images/units/elves-wood/spellbinder.png -- 1.33kb -> 1.27kb (4.49%)
/images/units/faeries/elynia-e3-attack-ranged-1.png -- 1.47kb -> 1.40kb (4.46%)
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/images/units/elves-quenoth/shaman.png -- 1.03kb -> 0.99kb (4.36%)
/images/units/elves-quenoth/scout-defend-1.png -- 1.66kb -> 1.59kb (4.35%)
/images/units/elves-quenoth/flanker-defend1.png -- 1.24kb -> 1.19kb (4.33%)
/images/units/faeries/guardian-of-earth-aradellys-dying-1.png -- 1.40kb -> 1.34kb (4.24%)
/images/units/faeries/elynia-f.png -- 1.31kb -> 1.26kb (4.17%)
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/images/units/elves-quenoth/warrior.png -- 1.26kb -> 1.21kb (4.02%)
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/images/units/elves-quenoth/fighter-attack3.png -- 1.14kb -> 1.10kb (3.93%)
/images/units/elves-quenoth/ranger.png -- 1.38kb -> 1.33kb (3.89%)
/images/units/demons/errant-executor.png -- 1.28kb -> 1.23kb (3.89%)
/images/units/faeries/night-nymph.png -- 1.13kb -> 1.09kb (3.88%)
/images/units/demons/slashing-gale+female.png -- 1.39kb -> 1.33kb (3.8%)
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/images/units/elves-quenoth/sun_sylph/sun-sylph-defend2.png -- 1.26kb -> 1.22kb (3.56%)
/images/units/faeries/nightshade-fire-awakening-6.png -- 0.96kb -> 0.93kb (3.56%)
/images/units/human-chaos/gunner.png -- 0.93kb -> 0.90kb (3.56%)
/images/units/elves-quenoth/fighter-attack4.png -- 1.14kb -> 1.10kb (3.53%)
/images/units/elves-quenoth/champion.png -- 1.54kb -> 1.48kb (3.44%)
/images/units/elves-quenoth/sun_sylph/sun-sylph-defend1.png -- 1.39kb -> 1.34kb (3.38%)
/images/units/elves-quenoth/scout-defend-2.png -- 1.58kb -> 1.53kb (3.27%)
/images/units/elves-quenoth/fighter-attack2.png -- 1.09kb -> 1.05kb (3.14%)
/images/terrain/tile-icons/overlay-flag-E.png -- 0.68kb -> 0.66kb (3.14%)
/images/units/faeries/elynia-f-attack-ranged-1.png -- 1.28kb -> 1.24kb (3.13%)
/images/terrain/tile-icons/overlay-flag-F.png -- 0.69kb -> 0.67kb (3.13%)
/images/units/elves-quenoth/flanker-defend2.png -- 1.14kb -> 1.10kb (3.09%)
/images/units/demons/spelldancer.png -- 1.14kb -> 1.11kb (3.07%)
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/images/units/elves-quenoth/druid-defend1.png -- 1.08kb -> 1.05kb (2.79%)
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/images/units/faeries/elynia-f-attack-melee-2.png -- 1.31kb -> 1.27kb (2.69%)
/images/units/faeries/nightshade-fire-awakening-7.png -- 0.94kb -> 0.91kb (2.6%)
/images/units/elves-quenoth/fighter-attack5.png -- 1.02kb -> 1.00kb (2.48%)
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/images/units/demons/storm+female.png -- 1.17kb -> 1.14kb (2.26%)
/images/campaign-logo-episode2.jpg -- 29.49kb -> 28.83kb (2.25%)
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/images/units/demons/storm.png -- 1.15kb -> 1.13kb (2.12%)
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/images/units/faeries/ivyel-damaged.png -- 1.08kb -> 1.06kb (1.9%)
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/images/units/faeries/elynia-chained.png -- 1.14kb -> 1.12kb (1.63%)
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/images/units/elves-quenoth/druid-defend2.png -- 0.98kb -> 0.97kb (1.29%)
/images/units/faeries/ivyel.png -- 1.17kb -> 1.15kb (1.25%)
/images/items/crystal-communicator.png -- 0.84kb -> 0.83kb (1.05%)
/images/units/elves-quenoth/mystic/mystic-heal-5.png -- 0.92kb -> 0.91kb (0.85%)
/images/units/imps/valdemon-basher.png -- 0.96kb -> 0.96kb (0.81%)
/images/units/demons/shapeshifter.png -- 1.01kb -> 1.00kb (0.68%)
/images/units/elves-quenoth/mystic/mystic-defend-1.png -- 0.85kb -> 0.85kb (0.57%)
/images/units/elves-quenoth/shaman-defend1.png -- 0.90kb -> 0.90kb (0.54%)
/images/units/elves-quenoth/mystic/mystic-heal-8.png -- 0.89kb -> 0.89kb (0.44%)
/images/units/shaxthal/warlord-elyssa-f.png -- 1.07kb -> 1.07kb (0.36%)
/images/units/elves-quenoth/mystic/mystic-heal-2.png -- 0.83kb -> 0.83kb (0.35%)
/images/units/demons/shapeshifter+female.png -- 1.01kb -> 1.00kb (0.1%)
/images/story/original-ten.png -- 70.14kb -> 70.11kb (0.04%)

Signed-off-by: ImgBotApp [email protected]

[cooljeanius]

As with project-ethea/Invasion_from_the_Unknown#94, just noting that @ForestDragon-wesnoth rejected a similar PR against Spartan due to imgbot/Imgbot#856, so you may wish to check the saturation levels here to ensure that Imgbot didn't screw them up.