Update jest version to 27.x

package.json

@@ -46,7 +46,7 @@
     },
     "globals": {
       "ts-jest": {
-        "tsConfig": "tsconfig.json"
+        "tsconfig": "tsconfig.json"
       }
     },
     "testEnvironment": "node"
@@ -82,11 +82,11 @@
     "eslint-plugin-prettier": "^3.1.0",
     "eslint-plugin-promise": "^4.1.1",
     "eslint-plugin-standard": "^5.0.0",
-    "jest": "^26.6.3",
-    "jest-worker": "^26.0.0",
+    "jest": "^27.2.4",
+    "jest-worker": "^27.2.4",
     "lodash": "^4.17.14",
     "prettier": "^2.0.2",
-    "ts-jest": "^26.4.4",
+    "ts-jest": "^27.0.5",
     "typedoc": "^0.22.4"
   }
 }

test/integration/cancel.spec.ts

@@ -1,5 +1,5 @@
 import MastodonAPI from '@/mastodon/api_client'
-import Worker from 'jest-worker'
+import { Worker } from 'jest-worker'
 
 jest.mock('axios', () => {
   const mockAxios = jest.requireActual('axios')