Rename render acct (#5)

src/acct.ts

@@ -9,6 +9,6 @@ export function parse(acct: string): Acct {
 	return { username: split[0], host: split[1] || null };
 }
 
-export function render(acct: Acct): string {
+export function toString(acct: Acct): string {
 	return acct.host == null ? acct.username : `${acct.username}@${acct.host}`;
 }