The method -callWithObject:completion: throws an exception when trying to encode FIRTimestamp

[PomegranateApps]

[REQUIRED] Step 1: Describe your environment

• Xcode version: 12.2
• Firebase SDK version: Latest
• Installation method: CocoaPods
• Firebase Component: Functions

[REQUIRED] Step 2: Describe the problem

When calling the method -callWithObject:completion: it throws an exception if the dictionary for the object contains an FIRTimestamp value.

It should be able to encode this value.

Unsupported type: FIRTimestamp for value <FIRTimestamp: seconds=1605621091 nanoseconds=0>"

Steps to reproduce:

What happened? How can we make the problem occur?

FUNThrowInvalidArgument

Relevant Code:

FIRFunctions *functions = [FIRFunctions functions];
FIRHTTPSCallable *function = [functions HTTPSCallableWithName:@"myfunction"];	
NSDictionary *object = @{@"postDate": [FIRTimestamp timestampWithDate:[NSDate now]]};
[function callWithObject:object completion:^(FIRHTTPSCallableResult * _Nullable result, NSError * _Nullable error) {

}];			

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[paulb777]

@PomegranateApps Sorry for the trouble, but FirebaseFunctions does not support the FIRTimestamp type. There is an open feature request at #1738