Optional parameters in Actions not supported

[caboe]

Given an action wit optional parameter:
async testIt(context: TestContext, payload?: number): Promise<void> {}

Is mapped with:
export const testAction = dispatch(test.actions.testIt)

When you call the action inside a VUE Component with the optional parameter:
test.testAction(this.$store, 123)

You will get a compile error:
Expected 1 arguments, but got 2.

[CloudNiner]

I just ran into this issue, but for mutations using the commit() method:

const storeOptions = {
    ...,
    mutations: {
        setSomeValue(state: RootState, someValue?: string) {
            state.someValue = someValue;
        },
        ...
    }
};

export const commitSomeValue = commit(mutations.setSomeValue);

Generates a type signature for commitSomeValue:

const commitSomeValue: (store: ActionContext<RootState, RootState> | Store<RootState>) => void

instead of:

const commitSomeValue: (store: ActionContext<RootState, RootState> | Store<RootState>, someValue: string | undefined) => void

As a workaround, I just changed the types for setSomeValue to:

const setSomeValue: (state: RootState, someValue: string | undefined) => void

instead of using the optional ? syntax.