Parses the convertCurrency function

Author: cesarParra

.idea/libraries/Dart_Packages.xml

@@ -168,6 +168,7 @@ STANDARD        : 'standard';
 DISTANCE        : 'distance';
 GEOLOCATION     : 'geolocation';
 GROUPING        : 'grouping';
+CONVERT_CURRENCY : 'convertcurrency'; // used in both SOQL and SOSL
 
 // SOQL Date functions
 CALENDAR_MONTH      : 'calendar_month';