Dependency Updated

change all dependency and updated code according to this.

Chat with added friends only (privacy)

Added privacy on chat.
Now Chat can be done with added friends only.

Features:
-> Social Login (Google)
-> Chat with friends only
-> 1-1 chat
-> Send text and Images (from camera/gallery)
-> User online status

flutter chat

Features:
-> Social Login (Google)
-> 1-1 chat
-> Send text and Images
-> User online status