refactor: rename drop functions for clarity and update tests

src/plugins/rule34/api.ts

@@ -69,18 +69,18 @@ for (const k of baseResponse) {
     hyperlinkarray.push(k.file_url);
 }
 
-export async function drop() {
+export async function dropRule() {
     if (hyperlinkarray.length === 0) {
         await refresh();
-        return await drop();
+        return await dropRule();
     }
     return hyperlinkarray.pop()!;
 }
 
-export async function drop5() {
+export async function dropRule5() {
     let tmp = "";
     for (let i = 0; i < 5; i++) {
-        tmp += await drop() + "\n";
+        tmp += await dropRule() + "\n";
     }
     return tmp;
 }