[KUDU-1883] Support Ruby 2.4 in make docs task

• Type: Bug
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Fix Version/s: 1.4.0
• Component/s: documentation
• Target Version/s: 1.4.0
• Assignee: Grant Henke
• Reporter: Grant Henke
• Created: 15/Feb/17 23:25
• Updated: 19/Apr/17 18:54
• Resolved: 19/Apr/17 18:54

Description

While walking through the building Kudu steps I found my local ruby version broke the 'make docs' task.

It looks like the ruby json gem doesn't support 2.4 until version 1.8.5+. An example of another project with this issue for context is here

Additionally my macOS environment ran into an issue with the libv8 gem. It looks like xcode 7.3+ is not supported until version 3.16.14.14+. An example of another project with this issue for context is here. I would usually put this change in a separate jira but since its so small I figured it makes sense to just have 1 change. Happy to break it out if needed.