chore: Use gh-actions/actions/persistent-stores (#335)

The latest consul image incorrectly handles a '$' in the key name. 
This is causing failing tests since we use an '$inited' key. Until the 
consul change is remedied, we need to pin to a working version 
of consul.

This is already done in our shared GH action for persistent stores, so I
am updating this SDK to finally use that.

Author: keelerm84

.github/workflows/build-gem.yml

@@ -22,23 +22,15 @@ jobs:
       BUILD_PLATFORM: ${{ startsWith(inputs.version, 'jruby') && 'jruby' || 'ruby' }}
       FLAKY: ${{ startsWith(inputs.version, 'jruby') && 'true' || 'false' }}
 
-    services:
-      redis:
-        image: redis
-        ports:
-          - 6379:6379
-      dynamodb:
-        image: amazon/dynamodb-local
-        ports:
-          - 8000:8000
-      consul:
-        image: hashicorp/consul
-        ports:
-          - 8500:8500
-
     steps:
       - uses: actions/checkout@v4
 
+      - uses: launchdarkly/gh-actions/actions/persistent-stores@persistent-stores-v0
+        with:
+          redis: true
+          consul: true
+          dynamodb: true
+
       - uses: ./.github/actions/setup
         with:
           version: ${{ inputs.version }}

spec/ldclient_spec.rb

@@ -113,7 +113,7 @@ module LaunchDarkly
               prereq = flags_map[prereq[:key].to_sym]
               prereq_index = flags_list.index(prereq)
               if prereq_index > item_index
-                all_keys = (flags_list.map { |f| f[:key] }).join(", ")
+                all_keys = flags_list.map { |f| f[:key] }.join(", ")
                 raise "#{item[:key]} depends on #{prereq[:key]}, but #{item[:key]} was listed first; keys in order are [#{all_keys}]"
               end
             end