[fix] use pip parse requirements in setup.py

setup.py

@@ -1,9 +1,8 @@
 from setuptools import setup, find_packages
+from pip.req import parse_requirements
 
 version = "6.12.6"
-
-with open("requirements.txt", "r") as f:
-	install_requires = f.readlines()
+requirements = parse_requirements("requirements.txt", session="")
 
 setup(
 	name='erpnext',
@@ -14,5 +13,6 @@ setup(
 	packages=find_packages(),
 	zip_safe=False,
 	include_package_data=True,
-    install_requires=install_requires
+	install_requires=[str(ir.req) for ir in requirements],
+	dependency_links=[str(ir._link) for ir in requirements if ir._link]
 )