Bump mini_magick from 4.7.0 to 4.9.4

[dependabot]

Bumps mini_magick from 4.7.0 to 4.9.4.

Release notes

Sourced from mini_magick's releases.

v4.9.4

• Fixed a remote shell execution vulnerability when using MiniMagick::Image.open with URL coming from unsanitized user input (thanks to @​rootxharsh)
• Fixed some Ruby warnings (thanks to @​koic)

v4.9.3

• make MiniMagick::Tool not respond to everything

v4.9.2

• Fix breakage for MRI 2.3 and below

v4.9.1

• Properly handle EXIF parsing with ImageMagick 7
• Show an informative exception message on Timeout::Error
• Wait for the MiniMagick command to terminate after sending SIGTERM with open3

v4.9.0

New features

• Support ImageMagick 7

  • MiniMagick::Tool::Convert will now generate magick convert commands (and the same for others)
  • MiniMagick::Tool::Magick was added for generating magick commands

• MiniMagick.cli_prefix was added to configure a prefix for commands

  MiniMagick.cli_prefix = "firejail"
  
  MiniMagick::Tool::Magick.new { |magick| ... } # executes `firejail magick ...`

Other Improvements

• Fix deadlocks when using posix-spawn as a shell backend

• Fix Errno::ESRCH sometimes being raised when the ImageMagick command would time out

• #label and #caption will now generate regular options

  MiniMagick::Tool::Convert.new do |convert|
                           # BEFORE:       NOW:
    convert.label("foo")   # label:foo    -label foo
    convert.caption("bar") # caption:bar  -caption bar
  end

• Add pango creation operator

... (truncated)

Commits

• 293f9bb Bump to 4.9.4
• 4cd5081 Don't allow remote shell execution
• 152d33a Fix test failure
• 87e9059 Merge pull request #427 from koic/suppress_deprecation_warnings_in_production...
• b5ce047 Suppress warning: instance variable [@​processor](https://github.com/processor)_path not initialized
• a74b73e Suppress warning: instance variable [@​cli](https://github.com/cli)_path not initialized
• 6fca405 Suppress warning: instance variable [@​cli](https://github.com/cli) not initialized
• 64560f5 Suppress warning: method redefined; discarding old debug=
• 563cc61 Suppress warning: method redefined; discarding old cli_path
• 2965e55 Suppress warning: method redefined; discarding old cli and cli=
• Additional commits viewable in compare view

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