Bump google_maps_flutter from 2.5.3 to 2.7.0 in /google_maps (#2360)

Bumps
[google_maps_flutter](https://github.com/flutter/packages/tree/main/packages/google_maps_flutter)
from 2.5.3 to 2.7.0.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="3885ac2c5c"><code>3885ac2</code></a>
[google_maps_flutter] Custom marker size improvements (<a
href="https://github.com/flutter/packages/tree/main/packages/google_maps_flutter/issues/4055">#4055</a>)</li>
<li><a
href="dcd8586ca7"><code>dcd8586</code></a>
[google_maps_flutter] Custom marker size improvements - platform impls
(<a
href="https://github.com/flutter/packages/tree/main/packages/google_maps_flutter/issues/6826">#6826</a>)</li>
<li><a
href="28e8afd5d9"><code>28e8afd</code></a>
[google_maps_flutter] Undeprecate BitmapDescriptor methods (<a
href="https://github.com/flutter/packages/tree/main/packages/google_maps_flutter/issues/6832">#6832</a>)</li>
<li><a
href="a61103b76a"><code>a61103b</code></a>
[google_maps_flutter] Implement polyline patterns in google maps ios (<a
href="https://github.com/flutter/packages/tree/main/packages/google_maps_flutter/issues/5757">#5757</a>)</li>
<li><a
href="b16a7e32ac"><code>b16a7e3</code></a>
[many] Remove references to v1 embedding (<a
href="https://github.com/flutter/packages/tree/main/packages/google_maps_flutter/issues/6494">#6494</a>)</li>
<li><a
href="5cc71d00ac"><code>5cc71d0</code></a>
Update Flutter wiki links (<a
href="https://github.com/flutter/packages/tree/main/packages/google_maps_flutter/issues/6789">#6789</a>)</li>
<li><a
href="40268e7191"><code>40268e7</code></a>
[google_maps_flutter_platform_interface] Add improvements to
BitmapDescriptor...</li>
<li><a
href="788b666693"><code>788b666</code></a>
Update the repo for the 3.22 stable release (<a
href="https://github.com/flutter/packages/tree/main/packages/google_maps_flutter/issues/6730">#6730</a>)</li>
<li><a
href="cc47b06b43"><code>cc47b06</code></a>
[google_maps_flutter_web] Add marker clustering support (<a
href="https://github.com/flutter/packages/tree/main/packages/google_maps_flutter/issues/6187">#6187</a>)</li>
<li><a
href="bc6c186a87"><code>bc6c186</code></a>
[google_maps_flutter_android] Add marker clustering support (<a
href="https://github.com/flutter/packages/tree/main/packages/google_maps_flutter/issues/6185">#6185</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/flutter/packages/commits/google_maps_flutter-v2.7.0/packages/google_maps_flutter">compare
view</a></li>
</ul>
</details>
<br />


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google_maps/pubspec.yaml

@@ -10,7 +10,7 @@ dependencies:
   flutter:
     sdk: flutter
   cupertino_icons: ^1.0.2
-  google_maps_flutter: ^2.4.0
+  google_maps_flutter: ^2.7.0
   http: ^1.0.0
   json_annotation: ^4.7.0
   json_serializable: ^6.5.4