build(deps-dev): update shadow-cljs requirement in /template

Updates the requirements on [shadow-cljs](https://github.com/thheller/shadow-cljs) to permit the latest version.
- [Release notes](https://github.com/thheller/shadow-cljs/releases)
- [Changelog](https://github.com/thheller/shadow-cljs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/thheller/shadow-cljs/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

template/package.json

@@ -17,7 +17,7 @@
     "clj-kondo": "2019.10.11-alpha.1",
     "rimraf": "~3.0.0",
     "serve-handler": "~6.1.2",
-    "shadow-cljs": "~2.8.71",
+    "shadow-cljs": "~2.8.73",
     "taiko": "~1.0.2",
     "taiko-diagnostics": "~0.4.0",
     "zprint-clj": "^0.5.0"