fix(elevation): missing vvd core

components/elevation/package.json

@@ -26,6 +26,7 @@
 	},
 	"dependencies": {
 		"@vonage/vvd-foundation": "2.20.1",
+		"@vonage/vvd-core": "2.20.1",
 		"lit-element": "^2.4.0",
 		"tslib": "^2.3.0"
 	},

components/elevation/src/vwc-elevation.ts

@@ -1,3 +1,4 @@
+import '@vonage/vvd-core';
 import { customElement, html, LitElement } from 'lit-element';
 import { style } from './vwc-elevation.css.js';
 import { property } from 'lit-element/lib/decorators';