fix(rack 3): Fixes #1456 per #1457 (#1462)

* fix(rack 3): Fixes #1456 per #1457

* ci: exclude incidental failure in old Ruby/Rails

Author: bf4

.github/workflows/tests.yml

@@ -25,6 +25,8 @@ jobs:
         exclude:
           - ruby: 2.7.2
             rails: 5.0.7.2
+          - ruby: 2.6.6
+            rails: 5.0.7.2
           - ruby: 2.7.2
             rails: 4.2.11
           - ruby: 2.6.6
@@ -41,4 +43,4 @@ jobs:
       - name: Install dependencies
         run: bundle install --jobs 4 --retry 3
       - name: Run tests
-        run: bundle exec rake test
+        run: bundle exec rake test

lib/jsonapi/error.rb

@@ -15,7 +15,7 @@ def initialize(options = {})
       @source         = options[:source]
       @links          = options[:links]
 
-      @status         = Rack::Utils::SYMBOL_TO_STATUS_CODE[options[:status]].to_s
+      @status         = Rack::Utils.status_code(options[:status]).to_s
       @meta           = options[:meta]
     end