Update skeleton loader snapshot

To account for changes to `GLSkeletonLoader`

spec/frontend/vue_shared/components/resizable_chart/__snapshots__/skeleton_loader_spec.js.snap

 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`Resizable Skeleton Loader default setup renders the bars, labels, and grid with correct position, size, and rx percentages 1`] = `
-<gl-skeleton-loader-stub
-  baseurl=""
+<svg
+  class="gl-skeleton-loader"
+  preserveAspectRatio="xMidYMid meet"
+  version="1.1"
+  viewBox="0 0 400 130"
+>
+  <rect
+    clip-path="url(#null-idClip)"
     height="130"
-  preserveaspectratio="xMidYMid meet"
+    style="fill: url(#null-idGradient);"
     width="400"
->
+    x="0"
+    y="0"
+  />
+  <defs>
+    <clippath
+      id="null-idClip"
+    >
       <rect
         data-testid="skeleton-chart-grid"
         height="1px"
@@ -158,17 +170,67 @@ exports[`Resizable Skeleton Loader default setup renders the bars, labels, and g
         x="89.125%"
         y="95%"
       />
-</gl-skeleton-loader-stub>
+    </clippath>
+    <lineargradient
+      id="null-idGradient"
+    >
+      <stop
+        class="primary-stop"
+        offset="0%"
+      >
+        <animate
+          attributeName="offset"
+          dur="1s"
+          repeatCount="indefinite"
+          values="-2; 1"
+        />
+      </stop>
+      <stop
+        class="secondary-stop"
+        offset="50%"
+      >
+        <animate
+          attributeName="offset"
+          dur="1s"
+          repeatCount="indefinite"
+          values="-1.5; 1.5"
+        />
+      </stop>
+      <stop
+        class="primary-stop"
+        offset="100%"
+      >
+        <animate
+          attributeName="offset"
+          dur="1s"
+          repeatCount="indefinite"
+          values="-1; 2"
+        />
+      </stop>
+    </lineargradient>
+  </defs>
+</svg>
 `;
 
 exports[`Resizable Skeleton Loader with custom settings renders the correct position, and size percentages for bars and labels with different settings 1`] = `
-<gl-skeleton-loader-stub
-  baseurl=""
+<svg
+  class="gl-skeleton-loader"
+  preserveAspectRatio="xMidYMid meet"
+  version="1.1"
+  viewBox="0 0 400 130"
+>
+  <rect
+    clip-path="url(#-idClip)"
     height="130"
-  preserveaspectratio="xMidYMid meet"
-  uniquekey=""
+    style="fill: url(#-idGradient);"
     width="400"
->
+    x="0"
+    y="0"
+  />
+  <defs>
+    <clippath
+      id="-idClip"
+    >
       <rect
         data-testid="skeleton-chart-grid"
         height="1px"
@@ -320,5 +382,44 @@ exports[`Resizable Skeleton Loader with custom settings renders the correct posi
         x="88.9375%"
         y="98%"
       />
-</gl-skeleton-loader-stub>
+    </clippath>
+    <lineargradient
+      id="-idGradient"
+    >
+      <stop
+        class="primary-stop"
+        offset="0%"
+      >
+        <animate
+          attributeName="offset"
+          dur="1s"
+          repeatCount="indefinite"
+          values="-2; 1"
+        />
+      </stop>
+      <stop
+        class="secondary-stop"
+        offset="50%"
+      >
+        <animate
+          attributeName="offset"
+          dur="1s"
+          repeatCount="indefinite"
+          values="-1.5; 1.5"
+        />
+      </stop>
+      <stop
+        class="primary-stop"
+        offset="100%"
+      >
+        <animate
+          attributeName="offset"
+          dur="1s"
+          repeatCount="indefinite"
+          values="-1; 2"
+        />
+      </stop>
+    </lineargradient>
+  </defs>
+</svg>
 `;

spec/frontend/vue_shared/components/resizable_chart/skeleton_loader_spec.js

-import { shallowMount } from '@vue/test-utils';
+import { mount } from '@vue/test-utils';
 import ChartSkeletonLoader from '~/vue_shared/components/resizable_chart/skeleton_loader.vue';
 
 describe('Resizable Skeleton Loader', () => {
   let wrapper;
 
   const createComponent = (propsData = {}) => {
-    wrapper = shallowMount(ChartSkeletonLoader, {
+    wrapper = mount(ChartSkeletonLoader, {
       propsData,
     });
   };