Workaround for node bug 56219

nodejs/node#56219 breaks our base-64 encoder.  Node is off spec and should release fix quickly.  Normally I wouldn't patch but in this case workaround is innocuous.

Fixes project-chip#1516

packages/general/src/codec/Base64Codec.ts

@@ -77,7 +77,7 @@ export namespace Base64 {
             }
         }
 
-        return new TextDecoder("iso-8859-1").decode(out);
+        return new TextDecoder().decode(out);
     }
 
     /**