Update dependency ts-jest to v26.5.6

Author: renovate-bot

package-lock.json

@@ -45,7 +45,7 @@
     "rollup-plugin-json": "4.0.0",
     "rollup-plugin-node-resolve": "5.2.0",
     "rollup-plugin-typescript2": "0.30.0",
-    "ts-jest": "26.5.3",
+    "ts-jest": "26.5.6",
     "typescript": "4.2.3",
     "vue": "2.6.12",
     "vue-jest": "3.0.7",