refactor: updated boilerplate

moved from regex + ast eval to just using import

frappe/utils/boilerplate.py

@@ -269,17 +269,12 @@ def get_data():
 
 setup_template = """# -*- coding: utf-8 -*-
 from setuptools import setup, find_packages
-import re, ast
 
 with open('requirements.txt') as f:
 	install_requires = f.read().strip().split('\\n')
 
 # get version from __version__ variable in {app_name}/__init__.py
-_version_re = re.compile(r'__version__\s+=\s+(.*)')
-
-with open('{app_name}/__init__.py', 'rb') as f:
-	version = str(ast.literal_eval(_version_re.search(
-		f.read().decode('utf-8')).group(1)))
+from {app_name} import __version__ as version
 
 setup(
 	name='{app_name}',