fix(tsconfig.json): typo in includes (#917)

The directory constaining tests (unit and e2e)
in vue cli is "tests" not "test"

Author: elevatebart

packages/@vue/cli-plugin-typescript/generator/template/tsconfig.json

@@ -30,7 +30,7 @@
   "include": [
     "src/**/*.ts",
     "src/**/*.vue",
-    "test/**/*.ts"
+    "tests/**/*.ts"
   ],
   "exclude": [
     "node_modules"