Merge pull request #740 from R3DST0RM/feature/correct-opencontactform…

…-function-typing

Let `openContactForm` result be `Promise<Contact | null>`

index.d.ts

@@ -4,7 +4,7 @@ export function getContactById(contactId: string): Promise<Contact | null>;
 export function getCount(): Promise<number>;
 export function getPhotoForId(contactId: string): Promise<string>;
 export function addContact(contact: Partial<Contact>): Promise<Contact>;
-export function openContactForm(contact: Partial<Contact>): Promise<Contact>;
+export function openContactForm(contact: Partial<Contact>): Promise<Contact | null>;
 export function openExistingContact(contact: Contact): Promise<Contact>;
 export function viewExistingContact(contact: { recordID: string }): Promise<Contact | void>
 export function editExistingContact(contact: Contact): Promise<Contact>;