Upgrade the ruby version to 2.6.4 including the deployment files. I have already updated the servers to have the newest version so once merged we should be able to deploy normally (#1223)

Author: seanmarcia

.ruby-version

@@ -1 +1 @@
-2.6.2
+2.6.4

Gemfile

@@ -5,7 +5,7 @@ git_source(:github) do |repo_name|
   "https://github.com/#{repo_name}.git"
 end
 
-ruby "2.6.2"
+ruby "2.6.4"
 
 gem "api-auth", "~> 2.3"
 gem "bootstrap-sass"

Gemfile.lock

@@ -563,7 +563,7 @@ DEPENDENCIES
   yajl-ruby
 
 RUBY VERSION
-   ruby 2.6.2p47
+   ruby 2.6.4p104
 
 BUNDLED WITH
-   1.17.2
+   1.17.3

README.md

@@ -19,7 +19,7 @@ This project took what we built for the [Portland Diaper Bank in 2016](https://g
 The `ubuntu_installation.md` file ([https://github.com/rubyforgood/diaper/blob/master/ubuntu-installation.md](https://github.com/rubyforgood/diaper/blob/master/ubuntu-installation.md)) has detailed instructions for installation and configuration of an Ubuntu host to run this software. Although there is not a document for Mac OS, it may be helpful for that as well.
 
 ### Ruby Version
-This app uses Ruby version 2.6.2, indicated in `/.ruby-version` and `Gemfile`, which will be auto-selected if you use a Ruby versioning manager like `rvm`, `rbenv`, or `asdf`.
+This app uses Ruby version 2.6.4, indicated in `/.ruby-version` and `Gemfile`, which will be auto-selected if you use a Ruby versioning manager like `rvm`, `rbenv`, or `asdf`.
 
 ### Yarn Installation
 If you don't have Yarn installed, you can install with Homebrew on macOS `brew install yarn` or visit [https://yarnpkg.com/en/docs/install](https://yarnpkg.com/en/docs/install). Be sure to run `yarn install` after installing Yarn. NOTE: It's possible that Node version 12 may cause you problems, see issue #751. Node 10 or 11 seem to be fine.
@@ -113,7 +113,7 @@ Sometimes we want to get a PR up there and going so that other people can review
 * The generated `schema.rb` file may include or omit `id: :serial` for `create table`, and `null: false` for `t.datetime`. According to Aaron, this can safely be ignored, and it is probably best to commit the schema.rb only if you have committed anything that would change the DB schema (i.e. a migration).
 * If you have trouble relating to SSL libraries installing Ruby using `rvm` or `rbenv` on a Mac, you may need to add a command line option to specify the location of the SSL libraries. Assuming you are using `brew`, this will probably result in a command looking something like:
 
- ```rvm install 2.6.2 --with-openssl-dir=`brew --prefix openssl` ```.
+ ```rvm install 2.6.4 --with-openssl-dir=`brew --prefix openssl` ```.
 
 ### Becoming a Repo Contributor
 

config/deploy/production.rb

@@ -38,7 +38,7 @@
 # Feel free to add new variables to customise your setup.
 
 set :rvm_type, :user
-set :rvm_ruby_version, "2.6.2"
+set :rvm_ruby_version, "2.6.4"
 # Custom SSH Options
 # ==================
 # You may pass any option but keep in mind that net/ssh understands a