chore(deps): update dependency jest to v26.6.1

Author: renovate-bot

package.json

@@ -48,7 +48,7 @@
     "grunt-contrib-copy": "1.0.0",
     "grunt-exec": "3.0.0",
     "husky": "4.2.5",
-    "jest": "26.1.0",
+    "jest": "26.6.1",
     "load-grunt-configs": "1.0.0",
     "prettier": "2.0.5",
     "ts-jest": "26.2.0",