feat: add missing fields to Transaction type

These fields are available when retrieving transactions from a validated ledger,
e.g. with the 'account_tx' command.

src/models/transactions/common.ts

@@ -176,6 +176,18 @@ export interface BaseTransaction {
    * account it says it is from.
    */
   TxnSignature?: string
+  /**
+   * The date/time when this transaction was included in a validated ledger.
+   */
+  date?: number
+  /**
+   * An identifying hash value unique to this transaction, as a hex string.
+   */
+  hash?: string
+  /**
+   * The sequence number of the ledger that included this transaction.
+   */
+  ledger_index?: number
 }
 
 /**