1.19.0

Features

• move Message and Registration handlers to own validated class (ea3b48c2)
• handle provisioned errors gracefully (#682) (8e5f52ad, closes #658)
• add user record cleanup script (#677) (9e5a95f9, closes #645)
• include timestamps in tests' logs (#675) (a3c3b82a)
• add a new client_certs endpoint config option (58e0cbbd)
• add webpush topics (0fe241bb, closes #643)
• Switch to new http2 based APNS protocol (15fea87d)

Chore

• remove the wsaccel dependency on pypy (#683) (aa047f36)
• fix travis' virtualenv giving us an older python (#664) (f47b7435)

Bug Fixes

• assertRaises -> assert_raises (e417325c)
• assertTrue -> eq_ (c01eb4de)
• assertTrue -> ok_ (db4e6dca)
• adapt asserts to ok/eq_ (e9fd8a1c)
• assert -> ok_ (9b83d9c6)
• remove extra jws_err handler which caused extra write after finish (65c7a3a5)