update ts-jest

Author: Applelo

package.json

@@ -43,7 +43,7 @@
     "jest": "^26.4.2",
     "mini-css-extract-plugin": "^0.11.2",
     "prettier": "^2.1.2",
-    "ts-jest": "^26.4.0",
+    "ts-jest": "^26.4.1",
     "typescript": "^4.0.3",
     "webpack": "^4.44.2"
   }