refactor: (losslessly) compress images

[j9t]

Hi—spontaneous PR (working on updates to Imagemin Guard, testing them on somewhat random repos) that includes optimizations and a few savings for this repo’s images:

Compressed public/checkbox.png (0.79 KB → 0.65 KB)
Skipped public/chosen-sprite.png (already compressed more aggressively)
Compressed public/[email protected] (0.85 KB → 0.85 KB)
Compressed features/upload_files/img.png (7.74 KB → 4.51 KB)
Compressed public/images/email-top-banner.png (7.38 KB → 6.41 KB)
Compressed public/images/share-on-email-thin.png (2.36 KB → 2.11 KB)
Compressed public/images/share-on-fb-thin.png (4.38 KB → 2.63 KB)
Skipped public/images/share-on-fb.png (already compressed more aggressively)
Compressed public/images/share-on-g-thin.png (2.78 KB → 2.69 KB)
Skipped public/images/share-on-g.png (already compressed more aggressively)
Compressed public/images/share-on-tw-thin.png (3.65 KB → 2.43 KB)
Skipped public/images/share-on-tw.png (already compressed more aggressively)
Compressed app/assets/images/3dots.png (0.39 KB → 0.28 KB)
Compressed app/assets/images/EFF-logo-lockup-1color-white.png (5.80 KB → 4.51 KB)
Compressed app/assets/images/EFF_Monogram-red.png (0.94 KB → 0.51 KB)
Compressed app/assets/images/close.png (1.31 KB → 0.24 KB)
Skipped app/assets/images/empty.gif (already compressed)
Compressed app/assets/images/footer-cc.png (4.63 KB → 1.20 KB)
Compressed app/assets/images/footer-logo.png (3.60 KB → 3.03 KB)
Compressed app/assets/images/[email protected] (4.51 KB → 3.37 KB)
Compressed app/assets/images/missing.png (7.10 KB → 6.59 KB)
Skipped app/assets/images/mobile-apps.png (already compressed more aggressively)
Compressed app/assets/images/mobile-download-goog.png (2.36 KB → 2.36 KB)
Skipped app/assets/images/mobile-download-ios.png (already compressed more aggressively)
Compressed app/assets/images/og-image-default.png (7.10 KB → 6.59 KB)
Compressed app/assets/images/radio-checked.png (0.62 KB → 0.46 KB)
Compressed app/assets/images/radio-unchecked.png (0.49 KB → 0.28 KB)
Skipped app/assets/images/social-email.png (already compressed more aggressively)
Skipped app/assets/images/social-facebook.png (already compressed more aggressively)
Skipped app/assets/images/social-link.png (already compressed more aggressively)
Skipped app/assets/images/social-twitter.png (already compressed more aggressively)
Compressed app/assets/images/thankyou-circle.png (31.23 KB → 29.85 KB)
Compressed app/assets/images/twitter-card-homepage.png (7.10 KB → 6.59 KB)
Compressed spec/fixtures/files/test-image.png (5.41 KB → 3.51 KB)

Defensive base compression completed. You saved 20.89 KB.

The compression is lossless. Couldn’t detect any issues (which was the point of my own tests). Offering this if you like the improvements, otherwise feel free to discard!