Custom parse format doesn't support all constructor types

[solomon23]

Describe the bug

The dayjs constructor takes in an option type as such

export type OptionType = { locale?: string, format?: string, utc?: boolean } | string | string[]

but if you use object format { locale, format, etc} as an input using the customParseFormat it doesn't work as expected

dayjs/src/plugin/customParseFormat/index.js

Line 213 in 4aca4b1

if (typeof format === 'string') {

Only looks at that param as a string or array. So this just silently doesn't work properly. The typescript doesn't give any hints to this because the typing says sending in that format is ok

Expected behavior
Use a { locale, format, utc } should work properly when sent into a customerParseFormat plugin or it should explicitly fail instead of silently failing.

Information

• Day.js Version [e.g. v1.0.0]
• OS: [e.g. iOS]
• Browser [e.g. chrome 62]
• Time zone: [e.g. GMT-07:00 DST (Pacific Daylight Time)]