0.1.7

Features

• add UserOauth.isValid(), uses current date and expiresTimestamp to check token validity (3b56649)
• fix type for UserOauth.refreshToken, string -> string | null (even if it shouldn't be null) (3b56649)

Bug fixes

• use old access token on OauthManager.refreshToken() when spotify doesn't return new (9409609)
  ^ Bug was found and initially fixed by @Luna-devv (detailes); spotify API bug report found by @Digital39999; This fix is still being tested

Full Changelog: v0.1.1...v0.1.7