Update PyPI links

Makefile

@@ -8,7 +8,7 @@ release:
 register:
 	python setup.py sdist register -r pypi
 
-# Test it via `pip install -i https://testpypi.python.org/pypi <project_name>`
+# Test it via `pip install -i https://test.pypi.org/simple/ <project_name>`
 test-release:
 	python setup.py sdist bdist_wheel upload -r test
 

README.rst

@@ -2,7 +2,7 @@
 astor -- AST observe/rewrite
 =============================
 
-:PyPI: https://pypi.python.org/pypi/astor
+:PyPI: https://pypi.org/project/astor/
 :Documentation: https://astor.readthedocs.io
 :Source: https://github.com/berkerpeksag/astor
 :License: 3-clause BSD

docs/index.rst

@@ -11,7 +11,7 @@
 astor -- AST observe/rewrite
 ############################
 
-:PyPI: https://pypi.python.org/pypi/astor
+:PyPI: https://pypi.org/project/astor/
 :Source: https://github.com/berkerpeksag/astor
 :Issues: https://github.com/berkerpeksag/astor/issues/
 :License: 3-clause BSD