fixed ios build support. retry. 2

plugin.xml

@@ -108,6 +108,7 @@
             </config>
             <pods>
                 <pod name="Firebase/Messaging" spec="$IOS_FIREBASE_MESSAGING_VERSION" />
+                <pod name="FirebaseCore" options=":modular_headers => true" />
                 <pod name="FirebaseCoreInternal" options=":modular_headers => true" />
                 <pod name="GoogleUtilities" options=":modular_headers => true" />
             </pods>