Update rubygems to 2.6.4

2.1/Dockerfile

@@ -10,7 +10,7 @@ RUN mkdir -p /usr/local/etc \
 ENV RUBY_MAJOR 2.1
 ENV RUBY_VERSION 2.1.9
 ENV RUBY_DOWNLOAD_SHA256 034cb9c50676d2c09b3b6cf5c8003585acea05008d9a29fa737c54d52c1eb70c
-ENV RUBYGEMS_VERSION 2.6.3
+ENV RUBYGEMS_VERSION 2.6.4
 
 # some of ruby's build scripts are written in ruby
 # we purge this later to make sure our final image uses what we just built

2.1/alpine/Dockerfile

@@ -10,7 +10,7 @@ RUN mkdir -p /usr/local/etc \
 ENV RUBY_MAJOR 2.1
 ENV RUBY_VERSION 2.1.9
 ENV RUBY_DOWNLOAD_SHA256 034cb9c50676d2c09b3b6cf5c8003585acea05008d9a29fa737c54d52c1eb70c
-ENV RUBYGEMS_VERSION 2.6.3
+ENV RUBYGEMS_VERSION 2.6.4
 
 # some of ruby's build scripts are written in ruby
 # we purge this later to make sure our final image uses what we just built

2.1/slim/Dockerfile

@@ -23,7 +23,7 @@ RUN mkdir -p /usr/local/etc \
 ENV RUBY_MAJOR 2.1
 ENV RUBY_VERSION 2.1.9
 ENV RUBY_DOWNLOAD_SHA256 034cb9c50676d2c09b3b6cf5c8003585acea05008d9a29fa737c54d52c1eb70c
-ENV RUBYGEMS_VERSION 2.6.3
+ENV RUBYGEMS_VERSION 2.6.4
 
 # some of ruby's build scripts are written in ruby
 # we purge this later to make sure our final image uses what we just built

2.2/Dockerfile

@@ -10,7 +10,7 @@ RUN mkdir -p /usr/local/etc \
 ENV RUBY_MAJOR 2.2
 ENV RUBY_VERSION 2.2.5
 ENV RUBY_DOWNLOAD_SHA256 30c4b31697a4ca4ea0c8db8ad30cf45e6690a0f09687e5d483c933c03ca335e3
-ENV RUBYGEMS_VERSION 2.6.3
+ENV RUBYGEMS_VERSION 2.6.4
 
 # some of ruby's build scripts are written in ruby
 # we purge this later to make sure our final image uses what we just built

2.2/alpine/Dockerfile

@@ -10,7 +10,7 @@ RUN mkdir -p /usr/local/etc \
 ENV RUBY_MAJOR 2.2
 ENV RUBY_VERSION 2.2.5
 ENV RUBY_DOWNLOAD_SHA256 30c4b31697a4ca4ea0c8db8ad30cf45e6690a0f09687e5d483c933c03ca335e3
-ENV RUBYGEMS_VERSION 2.6.3
+ENV RUBYGEMS_VERSION 2.6.4
 
 # some of ruby's build scripts are written in ruby
 # we purge this later to make sure our final image uses what we just built

2.2/slim/Dockerfile

@@ -23,7 +23,7 @@ RUN mkdir -p /usr/local/etc \
 ENV RUBY_MAJOR 2.2
 ENV RUBY_VERSION 2.2.5
 ENV RUBY_DOWNLOAD_SHA256 30c4b31697a4ca4ea0c8db8ad30cf45e6690a0f09687e5d483c933c03ca335e3
-ENV RUBYGEMS_VERSION 2.6.3
+ENV RUBYGEMS_VERSION 2.6.4
 
 # some of ruby's build scripts are written in ruby
 # we purge this later to make sure our final image uses what we just built

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 2.6.3
+ENV RUBYGEMS_VERSION 2.6.4
 
 # some of ruby's build scripts are written in ruby
 # we purge this 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 2.6.3
+ENV RUBYGEMS_VERSION 2.6.4
 
 # some of ruby's build scripts are written in ruby
 # we purge this later to make sure our final image uses what we just built

2.3/slim/Dockerfile

@@ -23,7 +23,7 @@ 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 2.6.3
+ENV RUBYGEMS_VERSION 2.6.4
 
 # some of ruby's build scripts are written in ruby
 # we purge this later to make sure our final image uses what we just built