そういえばRubyのバージョンは上げなくていいんだっけ 
67bef15e5 (upstream/master) Add fallback section ID with ToC (#11941)
1051c5cff Bump puma from 4.1.1 to 4.2.0 (#11939)
172eaeba3 Add config of multipart threshold for S3 (#11924)
637cc7bf7 Bump doorkeeper from 5.2.0 to 5.2.1 (#11934)
85a619a42 Bump webmock from 3.7.3 to 3.7.5 (#11936)
ce8ea58bd Bump eslint from 6.1.0 to 6.4.0 (#11929)
36bdfce1b Bump simplecov from 0.17.0 to 0.17.1 (#11932)
a60c78f6b Bump chewy from 5.0.0 to 5.0.1 (#11935)
bdad34adf Bump redis from 4.1.2 to 4.1.3 (#11938)
3ff74cea7 Bump faker from 2.3.0 to 2.4.0 (#11933)
370813263 Bump sass from 1.22.9 to 1.22.12 (#11928)
936595697 Bump mini-css-extract-plugin from 0.7.0 to 0.8.0 (#11927)
695cbef0e Bump babel-jest from 24.8.0 to 24.9.0 (#11926)
9707e6471 Remove deprecated config from Heroku and Scalingo (#11925)