build(deps): bump firebase_core in /packages/altfire_tracker/example

Bumps [firebase_core](https://github.com/firebase/flutterfire/tree/master/packages/firebase_core) from 2.30.1 to 2.31.0.
- [Release notes](https://github.com/firebase/flutterfire/releases)
- [Changelog](https://github.com/firebase/flutterfire/blob/master/CHANGELOG.md)
- [Commits](https://github.com/firebase/flutterfire/commits/firebase_core-v2.31.0/packages/firebase_core)

---
updated-dependencies:
- dependency-name: firebase_core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

packages/altfire_tracker/example/pubspec.lock

@@ -196,10 +196,10 @@ packages:
     dependency: "direct main"
     description:
       name: firebase_core
-      sha256: "4aef2a23d0f3265545807d68fbc2f76a6b994ca3c778d88453b99325abd63284"
+      sha256: "372d94ced114b9c40cb85e18c50ac94a7e998c8eec630c50d7aec047847d27bf"
       url: "https://pub.dev"
     source: hosted
-    version: "2.30.1"
+    version: "2.31.0"
   firebase_core_platform_interface:
     dependency: "direct dev"
     description:
@@ -212,10 +212,10 @@ packages:
     dependency: transitive
     description:
       name: firebase_core_web
-      sha256: "67f2fcc600fc78c2f731c370a3a5e6c87ee862e3a2fba6f951eca6d5dafe5c29"
+      sha256: "43d9e951ac52b87ae9cc38ecdcca1e8fa7b52a1dd26a96085ba41ce5108db8e9"
       url: "https://pub.dev"
     source: hosted
-    version: "2.16.0"
+    version: "2.17.0"
   firebase_crashlytics:
     dependency: transitive
     description:

packages/altfire_tracker/example/pubspec.yaml

@@ -10,7 +10,7 @@ dependencies:
   altfire_tracker:
     path: ../
   dio: ^5.4.3+1
-  firebase_core: ^2.30.1
+  firebase_core: ^2.31.0
   flutter:
     sdk: flutter