Confirmed sucessful Firebase/Crashlytics installation

Pods/Crashlytics/Crashlytics.framework/README

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+We've now combined all our supported platforms into a single podspec. As a result, we moved our submit script to a new location for Cocoapods projects: ${PODS_ROOT}/Crashlytics/submit. To avoid breaking functionality that references the old location of the submit, we've placed this dummy script that calls to the correct location, while providing a helpful warning if it is invoked. This bridge for backwards compatibility will be removed in a future release, so please heed the warning!

Pods/Crashlytics/Crashlytics.framework/submit

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+if [[ -z $PODS_ROOT ]]; then
+echo "error: The submit binary delivered by cocoapods is in a new location, under '$"{"PODS_ROOT"}"/Crashlytics/submit'. This script was put in place for backwards compatibility, but it relies on PODS_ROOT, which does not have a value in your current setup. Please update the path to the submit binary to fix this issue."
+else
+echo "warning: The submit script is now located at '$"{"PODS_ROOT"}"/Crashlytics/submit'. To remove this warning, update your path to point to this new location."
+sh "${PODS_ROOT}/Crashlytics/submit" "$@"
+fi