Update to 2.3.1, bundler 1.13.6, rubygems 2.6.8

Author: docker-library-bot

2.3/Dockerfile

@@ -10,7 +10,7 @@ RUN mkdir -p /usr/local/etc \
 ENV RUBY_MAJOR 2.3
 ENV RUBY_VERSION 2.3.1
 ENV RUBY_DOWNLOAD_SHA256 b87c738cb2032bf4920fef8e3864dc5cf8eae9d89d8d523ce0236945c5797dcd
-ENV RUBYGEMS_VERSION 2.6.7
+ENV RUBYGEMS_VERSION 2.6.8
 
 # some of ruby's build scripts are written in ruby
 #   we purge system ruby later to make sure our final image uses what we just built

2.3/alpine/Dockerfile

@@ -10,7 +10,7 @@ RUN mkdir -p /usr/local/etc \
 ENV RUBY_MAJOR 2.3
 ENV RUBY_VERSION 2.3.1
 ENV RUBY_DOWNLOAD_SHA256 b87c738cb2032bf4920fef8e3864dc5cf8eae9d89d8d523ce0236945c5797dcd
-ENV RUBYGEMS_VERSION 2.6.7
+ENV RUBYGEMS_VERSION 2.6.8
 
 # some of ruby's build scripts are written in ruby
 #   we purge system ruby later to make sure our final image uses what we just built

2.3/slim/Dockerfile

@@ -22,7 +22,7 @@ RUN mkdir -p /usr/local/etc \
 ENV RUBY_MAJOR 2.3
 ENV RUBY_VERSION 2.3.1
 ENV RUBY_DOWNLOAD_SHA256 b87c738cb2032bf4920fef8e3864dc5cf8eae9d89d8d523ce0236945c5797dcd
-ENV RUBYGEMS_VERSION 2.6.7
+ENV RUBYGEMS_VERSION 2.6.8
 
 # some of ruby's build scripts are written in ruby
 #   we purge system ruby later to make sure our final image uses what we just built