Separate specs from rubocop in github actions

.github/workflows/main.yml

@@ -3,7 +3,7 @@ name: Ruby
 on: [push,pull_request]
 
 jobs:
-  build:
+  test:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
@@ -16,3 +16,16 @@ jobs:
         gem install bundler -v 2.2.2
         bundle install
         bundle exec rake
+  rubocop:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: 3.0.0
+    - name: Run the default task
+      run: |
+        gem install bundler -v 2.2.2
+        bundle install
+        bundle exec rubocop

.rubocop.yml

@@ -1,3 +1,6 @@
+AllCops:
+  TargetRubyVersion: 2.4
+
 Style/StringLiterals:
   Enabled: true
   EnforcedStyle: double_quotes
@@ -8,3 +11,8 @@ Style/StringLiteralsInInterpolation:
 
 Layout/LineLength:
   Max: 120
+
+Metrics/BlockLength:
+  Enabled: true
+  Exclude:
+    - spec/*_spec.rb

Rakefile

@@ -9,4 +9,4 @@ require "rubocop/rake_task"
 
 RuboCop::RakeTask.new
 
-task default: %i[spec rubocop]
+task default: %i[spec]

liquid_dynamic_context.gemspec

@@ -12,7 +12,7 @@ Gem::Specification.new do |spec|
   spec.description   = ""
   spec.homepage      = "https://github.com/timkaechele/liquid_dynamic_context"
   spec.license       = "MIT"
-  spec.required_ruby_version = Gem::Requirement.new(">= 2.3.0")
+  spec.required_ruby_version = Gem::Requirement.new(">= 2.4.0")
 
   # spec.metadata["allowed_push_host"] = "TODO: Set to 'http://mygemserver.com'"