Update paperclip gem 4.0.0 -> 4.1.0

Changes:

  - Improvement: Add :content_type_mappings to correct for missing spoof
    types
  - Improvement: Credit Egor Homakov with discovering the content_type
    spoof bug
  - Improvement: Memoize calls to identify in the thumbnail processor
  - Improvement: Make MIME type optional for Data URIs.
  - Improvement: Add default format for styles

Change-Id: Ia7b6239c48401b94f6dd887f1e032dcf4f4c0d76
Update term-ansicolor 1.2.2 -> 1.3.0, tins 0.13.2 -> 1.0

These are dependencies of the coveralls gem. Just bumping them to keep
things up to date.

Change-Id: Iab1b6e91169933f2f297f2fbb9dfe216c7983041