Bump mini_racer from 0.2.3 to 0.2.4

[dependabot-preview]

Bumps mini_racer from 0.2.3 to 0.2.4.

Changelog

Sourced from mini_racer's changelog.

• 02-11-2018

• 0.2.4

  • FIX: deadlock releasing context when shared isolates are used
  • FEATURE: include js backtrace when snapshots do not compile

• 28-09-2018

• 0.2.3

  • Drop all conditional logic from Mini Racer compilation for clang, always
    rely on MacOS being High Sierra or up

• 26-09-2018

• 0.2.2

  • WORKAROUND: RUBY_PLATFORM is hardcoded on Ruby compile and can not be
    trusted for feature detection, use a different technique when checking for
    macOS Mojave

• 25-09-2018

• 0.2.1

  • FEATURE: Mojave macOS support

• 06-07-2018

• 0.2.0

  • FEATURE: context#call to allow for cheaper invocation of functions
  • FIX: rare memory leak when terminating a long running attached function
  • FIX: rare segfault when terminating a long running attached function
  • FIX: Reimplement Isolate#idle_notification using idle_notification_deadline, API remains the same ignisf
  • Account for changes in the upstream V8 API ignisf
  • Support for libv8 6.7

23-08-2017

• 0.1.15

  • bump dependency of libv8 to 6.3

23-08-2017

• 0.1.14

  • libv8 erronuously bumped to beta, reverted change

... (truncated)

Commits

• 08e9271 version bump
• 93db4fa FIX: deadlock releasing context with shared isolate
• 7d71b65 Merge pull request #110 from dtheodor/master
• 058052d add test
• 419142a include js traceback on snapshot errors
• See full diff in compare view

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[coveralls]

Coverage remained the same at 78.87% when pulling 5e7d5bd on dependabot/bundler/mini_racer-0.2.4 into c5fccb2 on master.