Fix up Gemfiles for pg gem

hello_app/Gemfile_final

@@ -1,29 +1,32 @@
 source 'https://rubygems.org'
 
-gem 'rails',        '5.0.1'
-gem 'puma',         '3.4.0'
+gem 'rails',        '5.0.3'
+gem 'puma',         '3.9.1'
 gem 'sass-rails',   '5.0.6'
-gem 'uglifier',     '3.0.0'
-gem 'coffee-rails', '4.2.1'
-gem 'jquery-rails', '4.1.1'
+gem 'uglifier',     '3.2.0'
+gem 'coffee-rails', '4.2.2'
+gem 'jquery-rails', '4.3.1'
 gem 'turbolinks',   '5.0.1'
-gem 'jbuilder',     '2.4.1'
+gem 'jbuilder',     '2.6.4'
 
 group :development, :test do
-  gem 'sqlite3', '1.3.12'
-  gem 'byebug',  '9.0.0', platform: :mri
+  gem 'sqlite3', '1.3.13'
+  gem 'byebug',  '9.0.6', platform: :mri
 end
 
 group :development do
-  gem 'web-console',           '3.1.1'
+  gem 'web-console',           '3.5.1'
   gem 'listen',                '3.0.8'
-  gem 'spring',                '1.7.2'
-  gem 'spring-watcher-listen', '2.0.0'
+  gem 'spring',                '2.0.2'
+  gem 'spring-watcher-listen', '2.0.1'
 end
 
+# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
+gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
+
 group :production do
-  gem 'pg', '0.18.4'
+  gem 'pg', '0.20.0'
 end
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
-gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
+gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

toy_app/Gemfile

@@ -1,7 +1,6 @@
 source 'https://rubygems.org'
 
 gem 'rails',        '5.0.3'
-gem 'sqlite3',      '1.3.13'
 gem 'puma',         '3.9.1'
 gem 'sass-rails',   '5.0.6'
 gem 'uglifier',     '3.2.0'
@@ -11,7 +10,8 @@ gem 'turbolinks',   '5.0.1'
 gem 'jbuilder',     '2.6.4'
 
 group :development, :test do
-  gem 'byebug', '9.0.6', platform: :mri
+  gem 'sqlite3', '1.3.13'
+  gem 'byebug',  '9.0.6', platform: :mri
 end
 
 group :development do
@@ -23,3 +23,10 @@ end
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
+
+group :production do
+  gem 'pg', '0.20.0'
+end
+
+# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
+gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]