Error Handling: non integer indices for string slicing

[Abdullahjavednesar]

Handling Exceptions when str slicing index in non integer

Example:

def f():
  s: str
  s = "01234"
  print(s[1:2.2])

Now throws error while calling f()

semantic error: slice indices must be integers or None
  |
4 |     print(s[1:2.2])
  |               ^^^ 

[certik]

I think this looks great, thanks!