Bump mysql2 from 0.4.10 to 0.5.3

[dependabot-preview]

Bumps mysql2 from 0.4.10 to 0.5.3.

Release notes

Sourced from mysql2's releases.

0.5.3

New Features

• Expose Windows client authentication (#1018)

Bug Fixes

• Support more MySQL encodings and warn rather than crash on unsupported encodings (#1040)

Changes

• Precompiled mysql2 gem for Windows supports Ruby 2.2, 2.3, 2.4, 2.5, 2.6. Windows Ruby 2.0 and 2.1 are dropped.
• Keyword arguments have to be explicitly double-splatted in Ruby 2.7+ (#1084)
• Add Centos to CI matrix (#989, #1085)
• Remove spec from gem (#1044)
• Replace Win32API with Fiddle, update appveyor.yml (#1053)
• Update README to clarify the protocol value in DATABASE_URL (#1047)
• Improve performance to call Mysql2::Result#each and Mysql2::Result#fields (#1046)
• Fix fragile specs due to clock skew and timeout/threads corruption (#1041)
• README updates (#1002, #1038)

0.5.2

New Features

None

Bug Fixes

• Bounds-check the encoding translation array from MySQL to Ruby encodings.

Changes

• Add more encoding translations for MySQL 8 compatibility.

0.5.1

New Features

• None

Bug Fixes

• Fix with --with-mysql-dir (#952)
• Prevent command out of sync errors with Prepared Statements (#956, #957, #958)

Changes

• Specs: Use the prepared statement performance schema if available (#960)
• README mysql2 0.5.x works with Rails 5.0.7, 5.1.6, and higher
• README be sure to read about the known limitations of prepared statements

... (truncated)

Commits

• db6733a Bump version to 0.5.3
• ff05239 Fix control flow in rb_set_ssl_mode_option for some client library versions (...
• dee108d Bump rake-compiler-dock to pick up Ruby 2.6, drop older ones
• cb49983 Merge pull request #1084 from kamipo/kwargs
• b700550 Fallback to older rubygems for staled Ruby
• d2a273f Update older rubygems to address to newer Ruby's warnings
• 5f7a271 Merge pull request #1085 from junaruga/hotfix/fix-travis-ci
• 12a5e96 Fix CentOS case error in Travis.
• 6abae9a Fix mysql-5.7 test case's error in Travis.
• fee3c71 Keyword arguments have to be explicitly double-splatted in Ruby 2.7+
• Additional commits viewable in compare view

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