fix lint errors

packages/backend/src/misc/cafy-id.ts

@@ -1,5 +1,6 @@
 import { Context } from 'cafy';
 
+// eslint-disable-next-line @typescript-eslint/ban-types
 export class ID<Maybe = string> extends Context<string | (Maybe extends {} ? string : Maybe)> {
 	public readonly name = 'ID';
 

packages/backend/src/misc/gen-avatar.ts

@@ -56,7 +56,7 @@ export function genAvatar(seed: string, stream: WriteStream): Promise<void> {
 	// 1*n (filled by false)
 	const center: boolean[] = new Array(n).fill(false);
 
-	// tslint:disable-next-line:prefer-for-of
+	// eslint:disable-next-line:prefer-for-of
 	for (let x = 0; x < side.length; x++) {
 		for (let y = 0; y < side[x].length; y++) {
 			side[x][y] = rand(3) === 0;