Merge pull request fhir-crucible#111 from fhir-crucible/drop-2.3

Remove Ruby 2.3 support.

.rubocop.yml

@@ -1,5 +1,7 @@
+inherit_from: .rubocop_todo.yml
+
 AllCops:
- TargetRubyVersion: 2.3
+ TargetRubyVersion: 2.4
  Exclude:
  - '*.gemspec'
  - 'Gemfile*'
@@ -24,4 +26,4 @@ Performance/Casecmp:
  Enabled: false
 
 Naming:
- Enabled: false
+ Enabled: false

.rubocop_todo.yml

@@ -0,0 +1,19 @@
+# This configuration was generated by
+# `rubocop --auto-gen-config`
+# on 2019-03-22 01:56:17 -0400 using RuboCop version 0.52.1.
+# The point is for the user to remove these configuration records
+# one by one as the offenses are removed from the code base.
+# Note that changes in the inspected code, or installation of new
+# versions of RuboCop, may require this file to be generated again.
+
+# Offense count: 4
+# Cop supports --auto-correct.
+Performance/RegexpMatch:
+ Exclude:
+ - 'lib/fhir_client/model/client_reply.rb'
+
+# Offense count: 197
+# Configuration parameters: AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
+# URISchemes: http, https
+Metrics/LineLength:
+ Max: 210

.travis.yml

@@ -1,6 +1,5 @@
 language: ruby
 rvm:
- - 2.3
  - 2.4
  - 2.5
  - 2.6

Gemfile

@@ -7,6 +7,6 @@ gemspec
 
 group :test do
  gem 'codeclimate-test-reporter', require: nil
- gem 'rubocop', '~> 0.56.0', require: false
+ gem 'rubocop', '~> 0.52.1', require: false
  gem 'awesome_print', require: 'ap'
 end