Merge pull request #549 from DefactoSoftware/dependabot-bundler-letter_opener-1.7.0

Bump letter_opener from 1.2.0 to 1.7.0

Author: jurre

Gemfile.lock

@@ -713,7 +713,7 @@ GEM
  kgio (2.11.0)
  launchy (2.4.2)
  addressable (~> 2.3)
- letter_opener (1.2.0)
+ letter_opener (1.7.0)
  launchy (~> 2.2)
  loofah (2.5.0)
  crass (~> 1.0.2)
@@ -757,7 +757,7 @@ GEM
  slop (~> 3.4)
  pry-rails (0.3.2)
  pry (>= 0.9.10)
- public_suffix (4.0.3)
+ public_suffix (4.0.5)
  rack (2.1.1)
  rack-test (0.6.3)
  rack (>= 1.0)