Bump Ruby version and update ROM gems

• Bumps the Ruby version to 2.4.0
• Bumps the versions of the following gems:
  • rom (~> 3.0.0)
  • rom-repository (~> 1.0.0)
  • rom-sql (~> 1.0.0)
  • rom-mapper (~> 0.5.0)
• Removes the rom-support dependency
• Sets up the registration of transproc's functions in lib/functions.rb

v0.9.1

Update spec helper and documentation

v0.9.0

Update dry web, ruby and related configuration.

Merge pull request #54 from icelab/update-dry-libraries

• Adds dry-web-roda
• Updates dry-web, dry-auto_inject and dry-component
• Utilises the new settings support in dry-web
• Renames /core dirs to /component