Handled nonnull arguments requirement from react native to maintain android compatibility

Summary

I was facing follow error from react native:

Argument 1 (NSNumber) of RNNetPrinter.connectPrinter has unspecified nullability but React requires that all NSNumber arguments are explicitly marked as `nonnull` to ensure compatibility with Android.

RCTLogArgumentError(RCTModuleMethod*, unsigned long, objc_object*, char const*)
    RCTModuleMethod.mm:67
-[RCTModuleMethod processMethodSignature]
-[RCTModuleMethod invokeWithBridge:module:arguments:]
facebook::react::invokeInner(RCTBridge*, RCTModuleData*, unsigned int, folly::dynamic const&, int, (anonymous namespace)::SchedulingContext)
facebook::react::RCTNativeModule::invoke(unsigned int, folly::dynamic&&, int)::$_0::operator()() const
invocation function for block in facebook::react::RCTNativeModule::invoke(unsigned int, folly::dynamic&&, int)
_dispatch_call_block_and_release
_dispatch_client_callout
_dispatch_main_queue_drain
_dispatch_main_queue_callback_4CF
__CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__
__CFRunLoopRun
CFRunLoopRunSpecific
GSEventRunModal
-[UIApplication _run]
UIApplicationMain
main
start_sim
0x0
0x0

Changelog

-Added nonnull attribute to the port argument in NetPrinter.connectPrinter function

HeligPfleigh / react-native-thermal-receipt-printer

Handled nonnull arguments requirement from react native to maintain android compatibility #155

Summary

Changelog