update to 4.2.1

docs/4.2/assets/img/favicons/browserconfig.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<browserconfig>
+  <msapplication>
+    <tile>
+      <square150x150logo src="/docs/4.2/assets/img/favicons/mstile-150x150.png"/>
+      <TileColor>#563d7c</TileColor>
+    </tile>
+  </msapplication>
+</browserconfig>

docs/4.2/assets/img/favicons/manifest.json

@@ -0,0 +1,20 @@
+{
+  "name": "Bootstrap",
+  "short_name": "Bootstrap",
+  "icons": [
+    {
+      "src": "/docs/4.2/assets/img/favicons/android-chrome-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    },
+    {
+      "src": "/docs/4.2/assets/img/favicons/android-chrome-512x512.png",
+      "sizes": "512x512",
+      "type": "image/png"
+    }
+  ],
+  "start_url": "/?utm_source=a2hs",
+  "theme_color": "#563d7c",
+  "background_color": "#563d7c",
+  "display": "standalone"
+}

docs/4.2/assets/img/favicons/safari-pinned-tab.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="933.333" height="933.333" version="1" viewBox="0 0 700 700">
+  <path d="M104.5.7C89.2 2.6 77.4 6.2 63.8 13.2 41.7 24.5 24.5 41.7 13.2 63.8 7.5 75.1 4.8 82.3 2.3 94 .6 102.1.5 114.3.5 350s.1 247.9 1.8 256c2.5 11.7 5.2 18.9 10.9 30.2 11.3 22.1 28.5 39.3 50.6 50.6 11.3 5.7 18.5 8.4 30.2 10.9 8.1 1.7 20.3 1.8 256 1.8s247.9-.1 256-1.8c11.7-2.5 18.9-5.2 30.2-10.9 22.1-11.3 39.3-28.5 50.6-50.6 5.7-11.3 8.4-18.5 10.9-30.2 1.7-8.1 1.8-20.3 1.8-256s-.1-247.9-1.8-256c-2.5-11.7-5.2-18.9-10.9-30.2C670.9 32.6 642.9 11 607 2.4 599.9.7 587.2.6 353.5.4 218.2.3 106.2.5 104.5.7zm315.3 153.6c47.4 9 75.3 30.5 85.6 65.9 5.1 17.8 5.6 43.1 1.1 60.3-2 7.5-7.9 20.3-12.2 26.4-8 11.3-21.9 22.8-36 30-3.5 1.7-6.3 3.5-6.3 3.9 0 .5 2.3 1.4 5.1 2 2.8.7 8.5 2.6 12.7 4.3 37.2 14.8 58.1 50.4 58.2 99 0 28.6-9 53.9-25.7 71.8-18.8 20.3-45.2 32.9-83.3 39.8-8.5 1.5-20.9 1.7-119.2 2l-109.8.4V151.9l110.8.4c95.5.3 111.8.6 119 2z"/>
+  <path d="M262 266.5v56.6l65.3-.4c57.2-.3 65.9-.5 70.7-2 15.8-4.8 28.7-14.9 34.4-27.1 4.4-9.2 5.6-15.3 5.6-28.4-.1-25.1-7.5-39.8-24.3-47.7-14.1-6.7-14.2-6.7-86.4-7.2l-65.3-.5v56.7zm0 171.5v64.1l71.3-.3c69.8-.3 71.4-.4 79-2.6 11.4-3.2 19.2-7.7 27.2-15.7 12.1-12 16.8-24.9 16.8-46 0-20.8-5.1-34.3-17.3-45.9-7.9-7.4-15.8-11.6-28.1-14.7-8.1-2.1-10.5-2.2-78.6-2.6l-70.3-.5V438z"/>
+</svg>