[Flutter] How do I resolve the pod install error on flutter?

cloud_firestore: ^0.16.0
firebase_auth: ^0.20.0+1
smooth_star_rating: ^1.0.4
google_maps: ^4.0.0
firebase_core: ^0.7.0
rxdart: ^0.24.1

Pod install Analyzing dependencies cloud_firestore: Using Firebase SDK version '7.3.0' defined in 'firebase_core' firebase_auth: Using Firebase SDK version '7.3.0' defined in 'firebase_core' firebase_core: Using Firebase SDK version '7.3.0' defined in 'firebase_core' [!] CocoaPods could not find compatible versions for pod "cloud_firestore": In Podfile: cloud_firestore (from .symlinks/plugins/cloud_firestore/ios)

Specs satisfying the cloud_firestore (from .symlinks/plugins/cloud_firestore/ios) dependency were found, but they required a higher minimum deployment target.

[!] Automatically assigning platform iOS with version 9.0 on target Runner because no platform was specified. Please specify a platform for this target in your Podfile. See https://guides.cocoapods.org/syntax/podfile.html#platform.
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I get this error on terminal whenever I try to install pod.

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