fix: setup.py not working under some environments (open used wrong codec)

Author: dakra

CHANGES.txt

@@ -1,3 +1,9 @@
+1.1 (unreleased)
+----------------
+
+- fix: setup.py not working under some environments (`open` used wrong codec)
+
+
 1.0
 ---
 

setup.py

@@ -3,9 +3,9 @@
 from os import path
 
 here = path.abspath(path.dirname(__file__))
-with open(path.join(here, 'README.rst')) as f:
+with open(path.join(here, 'README.rst'), encoding='utf-8') as f:
     README = f.read()
-with open(path.join(here, 'CHANGES.txt')) as f:
+with open(path.join(here, 'CHANGES.txt'), encoding='utf-8') as f:
     CHANGES = f.read()
 with open(path.join(here, 'atomx', 'version.py')) as f:
     exec(f.read())  # defines VERSION and API_VERSION