Major update for Julia code

[pddshk]

It speeds up Julia code ~5 times in comparison with origin.

1. Unlocked threads with open(path; lock = false)
2. Preallocated memory for resulting vector triangles = Vector{Triangle}(undef, triangle_count)
3. Used unsafe_read and pointer to read from file directly to memory

[pddshk]

However I updated Julia version in README. This code requires 1.5.3 or higher