Prep for v4.2.0 release

- Move 4.1 docs to 4.2
- Update versions everywhere to 4.1.3 with release script
- Manually bump the shorthand version in package.json
- Add 4.2 to the versions docs page
- Update some redirects
- Fix tests asset URLs
- Bump Nuget and more

site/docs/4.2/examples/pricing/pricing.css

@@ -0,0 +1,20 @@
+html {
+  font-size: 14px;
+}
+@media (min-width: 768px) {
+  html {
+    font-size: 16px;
+  }
+}
+
+.container {
+  max-width: 960px;
+}
+
+.pricing-header {
+  max-width: 700px;
+}
+
+.card-deck .card {
+  min-width: 220px;
+}