fix(Consumer): Render child content when slot-scope isn't defined. Provide a warning.

If slot slot-scoped isn't defined then this.$scopedSlots.default will be undefined. Calling in in
that scenario would result in an error. If it's undefined, fall back to render the default slot
while giving an error that slot-scope should be defined

Author: just-be-dev

src/Consumer.js

@@ -4,6 +4,10 @@ export default function Consumer(context) {
       context
     }),
     render(h) {
+      if (!this.$scopedSlots.default) {
+        console.warn("Context consumer expected to define slot-scope");
+        return this.$slots.default[0];
+      }
       return this.$scopedSlots.default(this.context.value);
     }
   };