update dependencies

package.json

@@ -3,9 +3,9 @@
         "test": "jest"
     },
     "devDependencies": {
-        "@types/jest": "^26.0.14",
-        "jest": "^26.5.3",
-        "ts-jest": "^26.4.1",
-        "typescript": "^4.0.3"
+        "@types/jest": "^26.0.20",
+        "jest": "^26.6.3",
+        "ts-jest": "^26.4.4",
+        "typescript": "^4.1.3"
     }
 }