chore(deps): add tsconfig package on @vue/vue2-jest

Author: nogic1008

packages/vue2-jest/package.json

@@ -55,7 +55,8 @@
     "@vue/component-compiler-utils": "^3.1.0",
     "chalk": "^2.1.0",
     "css-tree": "^2.0.1",
-    "source-map": "0.5.6"
+    "source-map": "0.5.6",
+    "tsconfig": "^7.0.0"
   },
   "repository": {
     "type": "git",