Downcase boolean strings when comparing boolean env types (#53)

* Downcase boolean strings when comparing boolean env types

Allows for configuration such as `True` or `TRUE`

* PR Feedback

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 - Drop support for Ruby 2.6 and 2.7.
 - Add support for Ruby 3.2 and 3.3.
+- Downcase boolean values when checking for truthiness.
 
 # 5.0.0
 

lib/prius/registry.rb

@@ -57,6 +57,8 @@ def load_int(name, required)
     def load_bool(name, required)
       value = load_string(name, required)
       return nil if value.nil?
+
+      value = value.downcase
       return true if %w[yes y true t 1].include?(value)
       return false if %w[no n false f 0].include?(value)
 

spec/prius/registry_spec.rb

@@ -7,7 +7,7 @@
     {
       "NAME" => "Harry",
       "AGE" => "25",
-      "ALIVE" => "yes",
+      "ALIVE" => "Yes",
       "BORN" => "2022-09-02",
       "INVALID_DATE" => "2022-02-99",
     }