Move __version__ before import

PEP 8 says:
> Module level “dunders” (i.e. names with two leading and two trailing
> underscores) such as `__all__`, `__author__`, `__version__`, etc. should
> be placed after the module docstring but before any import statements
> except `from __future__` imports.

https://peps.python.org/pep-0008/#module-level-dunder-names

Author: planet36

hsluv.py

@@ -5,12 +5,11 @@
     haxe -cp haxe/src hsluv.Hsluv -python hsluv.py
 """
 
+__version__ = '5.0.3'
+
 from functools import wraps as _wraps, partial as _partial  # unexport, see #17
 import math as _math  # unexport, see #17
 
-
-__version__ = '5.0.3'
-
 _m = [[3.240969941904521, -1.537383177570093, -0.498610760293],
       [-0.96924363628087, 1.87596750150772, 0.041555057407175],
       [0.055630079696993, -0.20397695888897, 1.056971514242878]]