Add meid

src/misc/gen-id.ts

@@ -1,5 +1,6 @@
 import { ulid } from 'ulid';
 import { genAid } from './id/aid';
+import { genMeid } from './id/meid';
 import { genObjectId } from './id/object-id';
 import config from '../config';
 
@@ -10,6 +11,7 @@ export function genId(date?: Date): string {
 
 	switch (metohd) {
 		case 'aid': return genAid(date);
+		case 'meid': return genMeid(date);
 		case 'ulid': return ulid(date.getTime());
 		case 'objectid': return genObjectId(date);
 		default: throw 'unknown id generation method';