downgrade jest

Author: yaroslav-codefresh

package.json

@@ -48,7 +48,7 @@
     "eslint-plugin-import": "^2.25.4",
     "eslint-plugin-jest": "^24.7.0",
     "eslint-plugin-mocha": "^8.2.0",
-    "jest": "^27.5.1"
+    "jest": "^26.6.3"
   },
   "jest": {
     "testEnvironment": "node",