New Features

• Add new connection argument :ssl_mode to Mysql2::Client#new
• Prepared statements now support DateTime arguments

Bugfixes

• Fix segfault when wrapper->result is used after it is freed
• Raise an exception but don't crash on non-string encoding argument
• Raise an exception but don't crash on nil argument to Mysql2::Client#new
• Avoid RangeError on integers larger than LONG_LONG
• Fix a BigDecimal value binding in Prepared Statements
• Avoid type error when using connect_timeout, read_timeout and write_timeout in a DATABASE_URL env variable

Changes

• Travis CI matrix now includes MySQL 8.0
• Travis CI matrix defaults to MySQL 5.6
• AppVeyor CI matrix switched to MySQL 5.7
• Fix test that implicitly creates a passwordless user
• Use RSpec expect output instead of StringIO
• Move macro REQUIRE_CONNECTED to client.c
• Add a note about casting boolean columns
• Suppress rubocop's invalid UTF-8 literal warning