Bump amber to >=0.20.0.

bower.json

@@ -27,7 +27,7 @@
   ],
   "private": false,
   "dependencies": {
-    "amber": "^0.19.1",
+    "amber": ">=0.20.0",
     "amber-compat-es2015": "^0.1.5"
   },
   "devDependencies": {
@@ -35,4 +35,4 @@
     "amber-ide-starter-dialog": "^0.1.0",
     "helios": "^0.8.0"
   }
-}
+}

src/Axxord.js

@@ -7,14 +7,12 @@ define(["amber/boot"
 
 //>>excludeEnd("imports");
 ){"use strict";
-if(!$boot.nilAsReceiver)$boot.nilAsReceiver=$boot.nil;
 if(!("nilAsValue" in $boot))$boot.nilAsValue=$boot.nilAsReceiver;
 var $core=$boot.api,nil=$boot.nilAsValue,$nil=$boot.nilAsReceiver,$recv=$boot.asReceiver,$globals=$boot.globals;
-if(!$boot.nilAsClass)$boot.nilAsClass=$boot.dnu;
 $core.addPackage("Axxord");
-$core.packages["Axxord"].innerEval = function (expr) { return eval(expr); };
-$core.packages["Axxord"].imports = ["axxord/Axxord-Axon"];
-$core.packages["Axxord"].transport = {"type":"amd","amdNamespace":"axxord"};
+($core.packageDescriptors||$core.packages)["Axxord"].innerEval = function (expr) { return eval(expr); };
+($core.packageDescriptors||$core.packages)["Axxord"].imports = ["axxord/Axxord-Axon"];
+($core.packageDescriptors||$core.packages)["Axxord"].transport = {"type":"amd","amdNamespace":"axxord"};
 
 $core.addClass("Axes", $globals.Object, [], "Axxord");