v0.27.30

Bug fixes

• strictly check operator overload ambiguity (#2762) (dfc8a65)
  Operator overload is an internal mechanism, it can support to compare user-defined class, but it need to be limited.
  a == b and b == a should run the same function and get the same result in semantic level. Allowing ambiguity is bug prone.
• report error for mulitple union type (#2872) (1847c8f)

Other

• bump dependence typescript: 4.7.4 → 5.5.4 (#2868) (4bd1c12)