Upgrade to ruby 2.7.1

Gemfile

@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-ruby '2.3.1'
+ruby '2.7.1'
 
 gem 'scraperwiki', :git => 'https://github.com/openaustralia/scraperwiki-ruby/', :branch => 'morph_defaults'
 gem 'petrify', '>= 0.4.0'

Gemfile.lock

@@ -48,7 +48,7 @@ DEPENDENCIES
   scraperwiki!
 
 RUBY VERSION
-   ruby 2.3.1p112
+   ruby 2.7.1p83
 
 BUNDLED WITH
-   1.16.5
+   2.1.4