Update to 0.36.0:
- wrap SocketIO in io.Buffered* for makefile
- SSL.Connection.close accepts an argument to force the socket closing

- SSL.Connection: make the clientPostConnectionCheck an instance
attribute
- Fixed bug with usage of unexisting method getreply at SSL_Transport

- Add appveyor builds for python 3.7 and 3.8
- Fixed syntax warning on line 44.
- Update M2Crypto.six to 1.13.0
- base64.decodestring() was finally removed in Python 3.8.
- wrap SocketIO in io.Buffered* for makefile
- NULL is legal argument for key and iv paramters of EVP_CipherInit(3)

- Expose X509_V_FLAG_ALLOW_PROXY_CERTS verification flag and
X509_STORE_SET_FLAGS function
- Stop testing for 2.6 and 3.4 on Travis. Start testing 3.8
- Extend test cert validity to 2049
- Revert using typing module in 2.6. It is just not worthy.
- Update Debian/stable SSL as well
- Make tests pass again.
- Stop using string module, which has been deprecated.
- Tiny fixes to make pyls more happy
- CI: Rework Fedora CI configuration
- Remove upstream merged patch 001-fix-buffering-for-python38.patch.