Add inferred type warning in dev mode (#55)

* Add inferred type warning in dev mode

When using the `@Model` decorator API, the jsonapi type will be inferred
based on the class name. This is really convenient for getting up and
running quickly, but when building code into a minified browser bundle,
the class names are minified as well, ruining the inferrence.  This
commit detects if the user is running in non-production mode in a
browser and provides a console warning if the inferrence code is called.

* build bundle

Author: wadetandy

lib-esm/decorators.js

@@ -0,0 +1,5 @@
+export declare const inBrowser: boolean;
+export declare const isProd: boolean;
+export declare const config: {
+    productionTip: boolean;
+};

lib-esm/decorators.js.map

@@ -0,0 +1,5 @@
+export declare const inBrowser: boolean;
+export declare const isProd: boolean;
+export declare const config: {
+    productionTip: boolean;
+};