Update to 2.6.0-preview2, bundler 1.16.5, rubygems 2.7.7

Author: docker-library-bot

2.6-rc/alpine3.7/Dockerfile

@@ -11,7 +11,7 @@ ENV RUBY_MAJOR 2.6-rc
 ENV RUBY_VERSION 2.6.0-preview2
 ENV RUBY_DOWNLOAD_SHA256 00ddfb5e33dee24469dd0b203597f7ecee66522ebb496f620f5815372ea2d3ec
 ENV RUBYGEMS_VERSION 2.7.7
-ENV BUNDLER_VERSION 1.16.4
+ENV BUNDLER_VERSION 1.16.5
 
 # 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

2.6-rc/alpine3.8/Dockerfile

@@ -11,7 +11,7 @@ ENV RUBY_MAJOR 2.6-rc
 ENV RUBY_VERSION 2.6.0-preview2
 ENV RUBY_DOWNLOAD_SHA256 00ddfb5e33dee24469dd0b203597f7ecee66522ebb496f620f5815372ea2d3ec
 ENV RUBYGEMS_VERSION 2.7.7
-ENV BUNDLER_VERSION 1.16.4
+ENV BUNDLER_VERSION 1.16.5
 
 # 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

2.6-rc/stretch/Dockerfile

@@ -11,7 +11,7 @@ ENV RUBY_MAJOR 2.6-rc
 ENV RUBY_VERSION 2.6.0-preview2
 ENV RUBY_DOWNLOAD_SHA256 00ddfb5e33dee24469dd0b203597f7ecee66522ebb496f620f5815372ea2d3ec
 ENV RUBYGEMS_VERSION 2.7.7
-ENV BUNDLER_VERSION 1.16.4
+ENV BUNDLER_VERSION 1.16.5
 
 # 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

2.6-rc/stretch/slim/Dockerfile

@@ -23,7 +23,7 @@ ENV RUBY_MAJOR 2.6-rc
 ENV RUBY_VERSION 2.6.0-preview2
 ENV RUBY_DOWNLOAD_SHA256 00ddfb5e33dee24469dd0b203597f7ecee66522ebb496f620f5815372ea2d3ec
 ENV RUBYGEMS_VERSION 2.7.7
-ENV BUNDLER_VERSION 1.16.4
+ENV BUNDLER_VERSION 1.16.5
 
 # 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