Bump go_router from 11.1.4 to 12.0.0 in /provider_shopper (#2054)

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Bumps [go_router](https://github.com/flutter/packages/tree/main/packages) from 11.1.4 to 12.0.0.
<details>
<summary>Commits</summary>
<ul>
<li><a href="1a24dadf92"><code>1a24dad</code></a> [go_router] adds ability to dynamically update routing table. (<a href="https://github.com/flutter/packages/tree/main/packages/issues/5079">#5079</a>)</li>
<li><a href="47a14fd229"><code>47a14fd</code></a> [flutter_lints] rev flutter_lints to 3.0; increase dep on package:lints (<a href="https://github.com/flutter/packages/tree/main/packages/issues/5177">#5177</a>)</li>
<li><a href="d4390624a6"><code>d439062</code></a> [gis_web] Adds FedCM toggle. (<a href="https://github.com/flutter/packages/tree/main/packages/issues/5123">#5123</a>)</li>
<li><a href="e8127e76d5"><code>e8127e7</code></a> [quick_actions] Convert android to pigeon (<a href="https://github.com/flutter/packages/tree/main/packages/issues/5099">#5099</a>)</li>
<li><a href="b96a6dae0c"><code>b96a6da</code></a> [flutter_image] added example app (<a href="https://github.com/flutter/packages/tree/main/packages/issues/4353">#4353</a>)</li>
<li>See full diff in <a href="https://github.com/flutter/packages/commits/go_router-v12.0.0/packages">compare view</a></li>
</ul>
</details>
<br />

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provider_shopper/pubspec.yaml

@@ -10,7 +10,7 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
-  go_router: ^11.0.0
+  go_router: ^12.0.0
   provider: ^6.0.2
   window_size:
     git: