New wren methods ticker_currency() and ticker_exchange()

src/bitcoinity_ticker_price.hpp

@@ -20,10 +20,17 @@
 #include "ticker_price.hpp"
 
 namespace duck {
+enum class BitcoinityMatchType {
+	Any,
+	Exact,
+	CurrencyOnly,
+	ExchangeOnly
+};
+
 TickerPrice bitcoinity_ticker_price (
 	std::string_view exchange,
 	std::string_view currency,
-	bool exact_match
+	BitcoinityMatchType match_type
 );
 
 extern const std::string_view g_bitcoinity_wren_module;