firebase firestore dependency

1if you are using firebase bom then don't mention version (x.y.z)
2highly recomended to use firebase bom
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5dependencies {
6    // Import the BoM for the Firebase platform
7    implementation platform('com.google.firebase:firebase-bom:28.2.0')
8
9    // Declare the dependency for the Cloud Firestore library
10    // When using the BoM, you don't specify versions in Firebase library dependencies
11    implementation 'com.google.firebase:firebase-firestore'
12}
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