maint: Add deprecation notice for Modernizr.

Modernizr will be removed in an upcoming minor version. It is not really
necessary anymore. Most browser support almost latest web technology and IE is
dead.
A no-js class on the body will still be replaced with a js class.

Author: thet

src/core/feature-detection.js

@@ -10,6 +10,8 @@
         html.classList.add("js");
     }
 
+    // NOTE: Modernizr will be removed in an upcoming minor release.
+
     // Do not load modernizr if disabled. It's enabled by default.
     // You might want to disable it for your project by setting:
     // window.__patternslib_disable_modernizr = true;

src/index.js

@@ -1,4 +1,5 @@
 // Load modernizr and the `html.js` feature class.
+// NOTE: Modernizr will be removed in an upcoming minor release.
 import "./core/feature-detection";
 
 // Webpack entry point for module federation.