Switch from minitest to rspec

spec/fixtures/parks.yml

@@ -0,0 +1,13 @@
+# Read about fixtures at https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  code: crla
+  name: Crater Lake National Park
+  states: OR
+  properties: {}
+
+two:
+  code: olym
+  name: Olympic National Park
+  states: WA
+  properties: {}