Update tests

src/components/Post/Meta/Meta.test.js

@@ -5,7 +5,7 @@ import Meta from './Meta';
 describe('Meta', () => {
   it('renders correctly', () => {
     const props = {
-      date: '2016-09-01T23:46:37.121Z'
+      date: '2016-09-01'
     };
 
     const tree = renderer.create(<Meta {...props} />).toJSON();

src/components/Post/Meta/__snapshots__/Meta.test.js.snap

@@ -8,7 +8,7 @@ exports[`Meta renders correctly 1`] = `
     className="meta__date"
   >
     Published 
-    2 Sep 2016
+    1 Sep 2016
   </p>
 </div>
 `;

src/components/Post/Post.test.js

@@ -13,7 +13,7 @@ describe('Post', () => {
         ]
       },
       frontmatter: {
-        date: '2016-09-01T23:46:37.121Z',
+        date: '2016-09-01',
         tags: [
           'test_0',
           'test_1'

src/components/Post/__snapshots__/Post.test.js.snap

@@ -41,7 +41,7 @@ exports[`Post renders correctly 1`] = `
         className="meta__date"
       >
         Published 
-        2 Sep 2016
+        1 Sep 2016
       </p>
     </div>
     <div