docs: update .all-contributorsrc [skip ci]

Author: allcontributors[bot]

.all-contributorsrc

@@ -450,6 +450,15 @@
  "contributions": [
  "content"
  ]
+ },
+ {
+ "login": "smonn",
+ "name": "Simon Ingeson",
+ "avatar_url": "https://avatars.githubusercontent.com/u/44818?v=4",
+ "profile": "https://www.smonn.se",
+ "contributions": [
+ "content"
+ ]
  }
  ],
  "projectName": "javascript-testing-best-practices",