added sqlite to Gemfile (#2528)

Gemfile

@@ -85,6 +85,9 @@ gem 'pluck_to_hash', '~> 1.0.2'
 
 gem 'local_time', '~> 2.1.0'
 
+# Use a sqlite database in test and development.
+gem 'sqlite3', '~> 1.3.6'
+
 group :production do
   # Use a postgres database in production.
   gem 'pg', '~> 0.18'
@@ -106,8 +109,6 @@ group :development, :test do
   gem 'byebug', platform: :mri
   # Environment configuration.
   gem 'dotenv-rails'
-  # Use a sqlite database in test and development.
-  gem 'sqlite3', '~> 1.3.6'
 end
 
 group :test do