docs(typedoc): hide browser createHash function from TypeDoc, add description

src/adapters/crypto.browser.ts

@@ -2,6 +2,11 @@
 // https://github.com/rollup/rollup-plugin-commonjs/issues/105#issuecomment-281917166
 import hash from 'hash.js'
 
+/**
+ * Simulate the Node.js crypto.createHash function using hash.js' implementation.
+ * @internal
+ * @hidden (TypeDoc currently doesn't understand @internal)
+ */
 export function createHash (algorithm: 'sha256') {
   return hash.sha256()
 }