chore(deps): update dependency ts-jest to v26.4.3

Author: renovate-bot

package-lock.json

@@ -47,7 +47,7 @@
     "jest": "26.6.1",
     "node-fetch": "2.6.1",
     "rimraf": "3.0.2",
-    "ts-jest": "26.4.1",
+    "ts-jest": "26.4.3",
     "tsconfigs": "4.0.2",
     "typescript": "4.0.5"
   },