[ImgBot] Optimize images

*Total -- 101.44kb -> 77.41kb (23.69%)

/assets/depviz.png -- 15.52kb -> 8.46kb (45.46%)
/assets/depviz_bg_white.png -- 14.44kb -> 8.95kb (38.03%)
/assets/depviz_bg_pink.png -- 15.96kb -> 9.98kb (37.49%)
/assets/depviz_bg_pink.svg -- 1.36kb -> 1.00kb (26.24%)
/assets/depviz_favicon_shape.svg -- 1.11kb -> 0.82kb (25.53%)
/assets/depviz_favicon.svg -- 1.20kb -> 0.90kb (24.98%)
/web/favicon/mstile-144x144.png -- 2.09kb -> 1.66kb (20.55%)
/web/favicon/mstile-70x70.png -- 1.57kb -> 1.29kb (18.36%)
/web/favicon/mstile-150x150.png -- 2.18kb -> 1.80kb (17.64%)
/web/favicon/mstile-310x150.png -- 2.36kb -> 1.98kb (16.23%)
/web/favicon/mstile-310x310.png -- 4.28kb -> 3.62kb (15.42%)
/web/favicon/android-chrome-192x192.png -- 6.15kb -> 5.46kb (11.29%)
/web/favicon/android-chrome-512x512.png -- 16.81kb -> 15.83kb (5.85%)
/web/favicon/apple-touch-icon.png -- 2.36kb -> 2.25kb (4.68%)
/assets/depviz_bg_white.svg -- 7.09kb -> 6.77kb (4.61%)
/assets/depviz.svg -- 6.97kb -> 6.66kb (4.39%)

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