Merge pull request #45 from rposborne/2.12.5.0-heroku18

2.12.5.0 heroku stack 18 support

README.mdown

@@ -1,15 +1,23 @@
 # wkhtmltopdf-heroku
 
-Provides a [wkhtmltopdf](http://wkhtmltopdf.org/) binary for [Heroku](http://www.heroku.com/) Ubuntu 16.04 LTS environment.
+Provides a [wkhtmltopdf](http://wkhtmltopdf.org/) binary for [Heroku](http://www.heroku.com/) Ubuntu 18.04/16.04 LTS environment.
 
 Preconfigures [pdfkit](https://rubygems.org/gems/pdfkit), [wicked_pdf](https://rubygems.org/gems/wicked_pdf), and [wisepdf](http://rubygems.org/gems/wisepdf) to use this binary if they are loaded.
 
 ## Installation
 
 In your `Gemfile`:
 
+For Heroku Stack 18 (Ubuntu 18.04)
+
+```ruby
+  gem 'wkhtmltopdf-heroku', '2.12.5.0'
+```
+
+For Heroku Stack 16 (Ubuntu 16.04)
+
 ```ruby
-  gem 'wkhtmltopdf-heroku'
+  gem 'wkhtmltopdf-heroku', '2.12.4'
 ```
 
 ## Usage

VERSION

@@ -1 +1 @@
-2.12.5.0-alpha
+2.12.5.0

wkhtmltopdf-heroku.gemspec

@@ -7,7 +7,7 @@ Gem::Specification.new do |s|
 
   s.authors = ["Brad Phelan"]
   s.date = Time.now.strftime('%Y-%m-%d')
-  s.description = "This gem provides a wkhtmltopdf binary and configures wisepdf, wicked_pdf, and pdfkit for ruby based applications running in Heroku's Cedar-14 stack"
+  s.description = "This gem provides a wkhtmltopdf binary and configures wisepdf, wicked_pdf, and pdfkit for ruby based applications running in Heroku"
   s.email = "bradphelan@xtargets.com"
   s.executables = ["wkhtmltopdf-linux-amd64"]
   s.extra_rdoc_files = [
@@ -26,6 +26,6 @@ Gem::Specification.new do |s|
   s.licenses = ["MIT"]
   s.require_paths = ["lib"]
   s.rubygems_version = "1.8.15"
-  s.summary = "provides wkhtmltopdf binaries for heroku cedar-14 stack"
+  s.summary = "provides wkhtmltopdf binaries for Heroku-18 stack"
 end