Merge pull request #24 from clevertech/fix/build

Rollback to jest 22

Author: jbmikk

core/package.json

@@ -84,20 +84,20 @@
     }
   },
   "devDependencies": {
-    "@types/jest": "^23.0.0",
+    "@types/jest": "^22.0.0",
     "@types/node": "^8.0.0",
     "commitizen": "^2.9.6",
     "coveralls": "^2.13.1",
     "cz-conventional-changelog": "^2.0.0",
     "husky": "^0.14.0",
-    "jest": "^23.0.0",
+    "jest": "^22.0.0",
     "lint-staged": "^4.0.0",
     "mysql": "^2.15.0",
     "pg": "^7.4.0",
     "prettier": "^1.9.2",
     "rimraf": "^2.6.1",
     "semantic-release": "^8.0.0",
-    "ts-jest": "^23.0.0",
+    "ts-jest": "^22.0.0",
     "ts-node": "^3.0.6",
     "tslint": "^5.4.3",
     "tslint-config-prettier": "^1.1.0",