Use snake case for Events range params (#748)

Author: amygdalama

src/events/interfaces/list-events-options.interface.ts

@@ -2,8 +2,8 @@ import { EventNames } from './event.interface';
 
 export interface ListEventOptions {
   events?: EventNames[];
-  rangeStart?: string;
-  rangeEnd?: string;
+  range_start?: string;
+  range_end?: string;
   limit?: number;
   after?: string;
 }