Upgrade ts-jest to work with Jest 27

Author: wimpyprogrammer

package.json

@@ -65,7 +65,7 @@
     "pretty-quick": "^3.1.0",
     "regex-to-strings": "^2.0.1",
     "rimraf": "^3.0.2",
-    "ts-jest": "^26.4.4",
+    "ts-jest": "^27.0.1",
     "ts-loader": "^9.1.2",
     "typescript": "^4.1.3",
     "webpack": "^5.0.0",