New Features

• Initial support for Python 3.7.
  (by @pfreixes in c3a5ec8 for #138)

• Implement PEP 567 support (contextvars module) for Python 3.7.
  (by @1st1 in 2a4fab4, 878e416, and b2bdaae for #155)

• Add uvloop's own version of asyncio/sslproto.py. SSL is now ~50% faster.
  (by @1st1 in 4d91264)

• Convert Future-returning loop methods to coroutines to match asyncio 3.7.
  (by @1st1 in 7384b22)

• Allow file objects to be passed to loop.subprocess*() functions.
  (by @1st1 in f083090 for #136)

• Make signals processing more reliable.
  (by @1st1 in 6e03e51)

• Prohibit adding a signal handler for SIGCHLD.
  (by @1st1 in cd53b7f for #156)

• Add uvloop.__version__.
  (by @1st1 in 740cb7f for #137)

Bug Fixes

• Upgrade to Cython 0.28.2.
  (by @1st1 in 98bdb55 for #122)

• Update libuv from v1.17.0 to v1.20.3.
  (by @1st1 in 572524a)

• Make sure UDP handles are cleaned-up properly.
  (by @1st1 in 13f63e0)

• Fix subprocess.close() to let its processes die gracefully.
  (by @1st1 in a78e4d2 and a455af3 for #128)

• Fix sock_connect() to resolve addresses for correct socket family.
  (by @1st1 in ce2bd4f for #139)

• Fix a race condition in SSL handshake.
  (by @1st1 in 447e124)