Update github workflows to build with rails 7

Author: bogdan

.github/workflows/ci.yml

@@ -12,7 +12,12 @@ jobs:
     strategy:
       matrix:
         ruby: ["2.7"]
-        gemfile: ["gemfiles/rails52_sprockets_3.gemfile"]
+        gemfile:
+          - rails50_sprockets_3.gemfile
+          - rails51_sprockets_3.gemfile
+          - rails52_sprockets_3.gemfile
+          - rails70_sprockets_4.gemfile
+
     env:
       BUNDLE_GEMFILE: ${{ matrix.gemfile }}
     steps:

Appraisals

@@ -8,12 +8,10 @@ def define_appraisal(rails, version, sprockets)
 end
 
 [
-  [:rails40, '4.0.13', [2, 3]],
-  [:rails41, '4.1.16', [2, 3]],
-  [:rails42, '4.2.9',  [2, 3]],
   [:rails50, '5.0.5',  [3]],
   [:rails51, '5.1.3',  [3]],
-  [:rails52, '5.2.3',  [3]]
+  [:rails52, '5.2.3',  [3]],
+  [:rails70, '7.0.3.1', [4]]
 ].each do |name, version, sprockets|
   define_appraisal(name, version, sprockets)
 end

gemfiles/rails40_sprockets_2.gemfile

@@ -5,4 +5,4 @@ source "http://rubygems.org"
 gem "railties", "~> 5.0.5"
 gem "sprockets", "~> 3.0"
 
-gemspec :path => "../"
+gemspec path: "../"

gemfiles/rails40_sprockets_3.gemfile

@@ -5,4 +5,4 @@ source "http://rubygems.org"
 gem "railties", "~> 5.1.3"
 gem "sprockets", "~> 3.0"
 
-gemspec :path => "../"
+gemspec path: "../"

gemfiles/rails41_sprockets_2.gemfile

@@ -5,4 +5,4 @@ source "http://rubygems.org"
 gem "railties", "~> 5.2.3"
 gem "sprockets", "~> 3.0"
 
-gemspec :path => "../"
+gemspec path: "../"

gemfiles/rails41_sprockets_3.gemfile

@@ -0,0 +1,8 @@
+# This file was generated by Appraisal
+
+source "http://rubygems.org"
+
+gem "railties", "~> 7.0.3.1"
+gem "sprockets", "~> 4.0"
+
+gemspec path: "../"