chore(tests): upgrate starter to jest 27 (#83)

update this starter to jest 27 by upgrading jest, its typings, and the
jest-cli. this upgrade requires the latest version of stencil, whose
minimum version is updated to v2.13.0

package.json

@@ -11,11 +11,11 @@
     "generate": "stencil generate"
   },
   "devDependencies": {
-    "@stencil/core": "^2.7.0",
+    "@stencil/core": "^2.13.0",
     "@stencil/router": "^1.0.1",
-    "@types/jest": "^26.0.24",
-    "jest": "^26.6.3",
-    "jest-cli": "^26.6.3",
+    "@types/jest": "^27.0.3",
+    "jest": "^27.4.5",
+    "jest-cli": "^27.4.5",
     "puppeteer": "^10.0.0"
   },
   "license": "MIT"