Upgrade SocketRocket to 0.6.1

[VytautasLozickas]

The TapkeyMobileLib cannot be used anymore with the latest React Native (0.72.4) as React-Core/RCTWebSocket requires SocketRocket (= 0.6.1) and TapkeyMobileLib/Core requires SocketRocket (= 0.6.0):

[!] CocoaPods could not find compatible versions for pod "SocketRocket":
  In Podfile:
    React-Core/RCTWebSocket (from `../node_modules/react-native/`) was resolved to 0.72.4, which depends on
      SocketRocket (= 0.6.1)

    TapkeyMobileLib (= 2.36.7.0) was resolved to 2.36.7.0, which depends on
      TapkeyMobileLib/Core (= 2.36.7.0) was resolved to 2.36.7.0, which depends on
        SocketRocket (= 0.6.0)

[tkhho]

We will relax the SocketRocket requirement with the next version.