## gem upgrade
気をつけた方がいいやつ
acts_as_taggable_on
devise
aws_sdk_rails
carrierwave
rmagick
puma
結構バージョン変わってるやつ
arel
https://qiita.com/valley/items/9ac200acbccc46b2ea44
whereやselectのメソッドチェーンからsqlを生成する
Arel Really Exasperates Logicians（Logician＝論理学者)
複雑なSQLクエリの生成を簡単にできるようにする
色んなRDBMSに対応できるようにする
フレームワーク(特にORM)のフレームワークとして開発された
aws_sdk_rails 関係
capistrano
carrierwave
coffee-rails
config
dry-logic
dry-types
fog
mysql2
public_suffix
rack-test
rambulnce
rbvmomi
rdoc
redcarpet
rmagick
roadie
roadie-rails
sass-rails
sassc
sdoc
sprockets
swagger-blocks
tzinfo
web-console
webpacker
whenever
```bash
* CFPropertyList (newest 3.0.1, installed 2.3.6)
* actioncable (newest 6.0.0, installed 5.1.1)
* actionmailer (newest 6.0.0, installed 5.1.1)
* actionpack (newest 6.0.0, installed 5.1.1)
* actionview (newest 6.0.0, installed 5.1.1)
* activejob (newest 6.0.0, installed 5.1.1)
* activemodel (newest 6.0.0, installed 5.1.1)
* activerecord (newest 6.0.0, installed 5.1.1)
* activesupport (newest 6.0.0, installed 5.1.1)
* addressable (newest 2.7.0, installed 2.5.2)
* arel (newest 9.0.0, installed 8.0.0)
* autoprefixer-rails (newest 9.6.5, installed 9.6.1.1)
* aws-sdk-core (newest 3.69.0, installed 2.11.181)
* aws-sdk-rails (newest 3.0.5, installed 1.0.1, requested ~> 1.0) in groups "default"
* aws-sdk-resources (newest 3.54.1, installed 2.11.181)
* aws-sigv4 (newest 1.1.0, installed 1.0.3)
* bindex (newest 0.8.1, installed 0.5.0)
* bootstrap-sass (newest 3.4.1, installed 3.3.7)
* bugsnag (newest 6.12.1, installed 6.9.0) in groups "default"
* bullet (newest 6.0.2, installed 6.0.0) in groups "development"
* capistrano (newest 3.11.2, installed 3.2.1, requested ~> 3.2.1) in groups "deployment"
* capistrano-bundler (newest 1.6.0, installed 1.4.0) in groups "deployment"
* carrierwave (newest 2.0.2, installed 1.2.3) in groups "default"
* coffee-rails (newest 5.0.0, installed 4.2.2) in groups "default"
* config (newest 2.0.0, installed 1.7.0) in groups "default"
* counter_culture (newest 2.2.4, installed 2.0.0) in groups "default"
* css_parser (newest 1.7.0, installed 1.6.0)
* daemons (newest 1.3.1, installed 1.2.6) in groups "default"
* delayed_job (newest 4.1.8, installed 4.1.5) in groups "default"
* delayed_job_active_record (newest 4.1.4, installed 4.1.3) in groups "default"
* dotenv (newest 2.7.5, installed 2.5.0)
* dotenv-rails (newest 2.7.5, installed 2.5.0) in groups "default"
* dry-configurable (newest 0.8.3, installed 0.7.0)
* dry-container (newest 0.7.2, installed 0.6.0)
* dry-core (newest 0.4.9, installed 0.4.7)
* dry-equalizer (newest 0.2.2, installed 0.2.1)
* dry-inflector (newest 0.2.0, installed 0.1.2)
* dry-logic (newest 1.0.3, installed 0.4.2)
* dry-types (newest 1.2.0, installed 0.13.3)
* dry-validation (newest 1.3.1, installed 0.12.2)
* exception_notification (newest 4.4.0, installed 4.3.0) in groups "default"
* excon (newest 0.67.0, installed 0.62.0)
* faraday (newest 0.17.0, installed 0.15.4)
* ffi (newest 1.11.1, installed 1.9.25)
* fog (newest 2.2.0, installed 1.41.0) in groups "default"
* fog-aliyun (newest 0.3.5, installed 0.3.2)
* fog-aws (newest 3.5.2, installed 2.0.1)
* fog-brightbox (newest 1.0.0, installed 0.16.1)
* fog-cloudatcost (newest 0.4.0, installed 0.1.2)
* fog-core (newest 2.1.2, installed 1.45.0)
* fog-dnsimple (newest 2.1.0, installed 1.0.0)
* fog-dynect (newest 0.4.0, installed 0.0.3)
* fog-google (newest 1.9.1, installed 0.1.0)
* fog-openstack (newest 1.0.10, installed 0.3.9)
* fog-vsphere (newest 3.2.1, installed 2.5.0)
* foreman (newest 0.86.0, installed 0.85.0) in groups "development"
* globalid (newest 0.4.2, installed 0.4.1)
* hashie (newest 3.6.0, installed 3.5.7)
* i18n (newest 1.7.0, installed 0.9.5)
* jbuilder (newest 2.9.1, installed 2.8.0) in groups "default"
* jpmobile (newest 6.0.0, installed 5.2.2) in groups "default"
* jquery-rails (newest 4.3.5, installed 4.3.3) in groups "default"
* json (newest 2.2.0, installed 1.8.6)
* jwt (newest 2.2.1, installed 2.1.0) in groups "default"
* letter_opener (newest 1.7.0, installed 1.6.0) in groups "development"
* libv8 (newest 7.3.492.27.1, installed 3.16.14.19)
* listen (newest 3.2.0, installed 3.1.5) in groups "development"
* lograge (newest 0.11.2, installed 0.10.0) in groups "default"
* mime-types (newest 3.3, installed 3.2.2)
* mime-types-data (newest 3.2019.1009, installed 3.2018.0812)
* mini_mime (newest 1.0.2, installed 1.0.1)
* multi_json (newest 1.14.1, installed 1.13.1)
* multipart-post (newest 2.1.1, installed 2.0.0)
* mysql2 (newest 0.5.2, installed 0.3.21, requested ~> 0.3.20) in groups "default"
* net-scp (newest 2.0.0, installed 1.2.1)
* net-ssh (newest 5.2.0, installed 5.0.2)
* nio4r (newest 2.5.2, installed 2.3.1)
* oauth2 (newest 1.4.2, installed 1.4.1)
* omniauth (newest 1.9.0, installed 1.8.1)
* omniauth-facebook (newest 5.0.0, installed 4.0.0, requested ~> 4.0) in groups "default"
* omniauth-oauth2 (newest 1.6.0, installed 1.5.0)
* public_suffix (newest 4.0.1, installed 3.0.3)
* puma (newest 4.2.1, installed 3.12.0, requested ~> 3.7) in groups "default"
* rack-cors (newest 1.0.3, installed 1.0.2) in groups "default"
* rack-mini-profiler (newest 1.1.0, installed 1.0.2) in groups "development"
* rack-test (newest 1.1.0, installed 0.6.3)
* rails (newest 6.0.0, installed 5.1.1, requested = 5.1.1) in groups "default"
* railties (newest 6.0.0, installed 5.1.1)
* rambulance (newest 1.0.3, installed 0.6.0) in groups "default"
* rb-inotify (newest 0.10.0, installed 0.9.10)
* rbvmomi (newest 2.2.0, installed 1.13.0)
* rdoc (newest 6.2.0, installed 4.3.0)
* redcarpet (newest 3.5.0, installed 2.3.0, requested ~> 2.3.0) in groups "default"
* redis (newest 4.1.3, installed 4.1.0)
* redis-actionpack (newest 5.1.0, installed 5.0.2)
* redis-activesupport (newest 5.2.0, installed 5.0.7)
* redis-rack (newest 2.0.6, installed 2.0.5)
* redis-store (newest 1.8.0, installed 1.6.0)
* rmagick (newest 4.0.0, installed 2.16.0) in groups "default"
* roadie (newest 4.0.0, installed 3.4.0)
* roadie-rails (newest 2.1.0, installed 1.3.0, requested ~> 1.0) in groups "default"
* sass (newest 3.7.4, installed 3.4.25)
* sass-rails (newest 6.0.0, installed 5.0.6, requested = 5.0.6) in groups "default"
* sassc (newest 2.2.1, installed 1.12.1)
* sdoc (newest 1.0.0, installed 0.4.2) in groups "doc"
* spring (newest 2.1.0, installed 2.0.2) in groups "deployment"
* sprockets (newest 4.0.0, installed 3.7.2)
* sshkit (newest 1.20.0, installed 1.18.0)
* swagger-blocks (newest 3.0.0, installed 2.0.2) in groups "default"
* temple (newest 0.8.2, installed 0.8.0)
* thor (newest 0.20.3, installed 0.19.4)
* tilt (newest 2.0.10, installed 2.0.9)
* tzinfo (newest 2.0.0, installed 1.2.5)
* uglifier (newest 4.2.0, installed 4.1.20) in groups "default"
* unicorn (newest 5.5.1, installed 5.4.1) in groups "default"
* uniform_notifier (newest 1.13.0, installed 1.12.1)
* web-console (newest 4.0.1, installed 3.5.1) in groups "development"
* webpacker (newest 4.0.7, installed 3.5.5, requested ~> 3.0) in groups "default"
* websocket-driver (newest 0.7.1, installed 0.6.5)
* websocket-extensions (newest 0.1.4, installed 0.1.3)
* whenever (newest 1.0.0, installed 0.10.0) in groups "default"
```
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