Clean up timestamps from dateModified

Author: Chalarangelo

src/blocks/extractor/textParser.js

@@ -16,7 +16,7 @@ export class TextParser {
     return readFile(filePath, 'utf8').then(content => {
       const { body, attributes } = frontmatter(content);
       const {
-        dateModified = '2021-06-13T05:00:00-04:00',
+        dateModified = '2021-06-13',
         author = null,
         language = null,
         ...restAttributes

src/test/blocks/extractor/textParser.test.js

@@ -3,7 +3,7 @@ import { TextParser } from 'blocks/extractor/textParser';
 jest.mock('fs/promises', () => ({
   readFile: jest.fn(() =>
     Promise.resolve(
-      '---\ntitle: Snippet\ntags: [array,object]\ndateModified: 2017-12-22T21:54:30+02:00\n---\n\nThis is some text.\n'
+      '---\ntitle: Snippet\ntags: [array,object]\ndateModified: 2017-12-22\n---\n\nThis is some text.\n'
     )
   ),
   readdir: jest.fn(() => Promise.resolve(['any.md'])),