Use PCG: https://www.pcg-random.org/

Here is a stand-alone implementation of PCG32 in Go:

  package pcg32

  type Src [2]uint64

  func New(bits1, bits2 uint64) *Src {
      return &Src{bits1, bits2 | 1}
  }

  func (s *Src) Uint32() uint32 {
      var (
          x = s[0]
          y = uint32(x >> 59)
          z = uint32((x>>18 ^ x) >> 27)
      )
      s[0] = s[1] + x*6364136223846793005
      return z>>y | z<<(-y&31)
  }

  func (s *Src) LessThan(n uint32) uint32 {
      for min := -n % n; ; {
          r := s.Uint32()
          if r >= min {
              return r % n
          }
      }
  }