message: refactor: fix older edge dev builds
diff: -export function warn(msg: string, ...args: any[]) {
  - console.warn('[Vue Router warn]: ' + msg, ...args)
  +export function warn(msg: string, ..._args: any[]): void
  +export function warn(msg: string): void {
  + // avoid using ...args as it breaks in older Edge builds
  + const args = Array.from(arguments).slice(1)
  + console.warn.apply(
  + console,
  + ['[Vue Router warn]: ' + msg].concat(args) as [string, ...any[]]
  + )
  }
  