fix: pod build

[luca-gr4vy]

Description: Fixes an issue where the new version of the pod cannot be installed:

[!] CocoaPods could not find compatible versions for pod "gr4vy-ios":
  In snapshot (Podfile.lock):
    gr4vy-ios (= 2.4.0)

  In Podfile:
    gr4vy-embed-react-native (from `../..`) was resolved to 2.0.0, which depends on
      gr4vy-ios (= 2.4.3)

Specs satisfying the `gr4vy-ios (= 2.4.0), gr4vy-ios (= 2.4.3)` dependency were found, but they required a **higher minimum deployment target**.

https://github.com/gr4vy/gr4vy-ios/pull/18/files#diff-fc40e39603744467ec4d9d7cb6c3bd67756ec09c037d03f3655904fc1c6bcfda