fix(Enums): Removed return type enforcement

Return type enforcement in contract and trait would prevent type return enforcement in implementation

Author: philippe-bourdeau

src/Utils/Contracts/Enums/EnumToStringLowerTrait.php

@@ -35,7 +35,7 @@ function __toString(): string
      *
      * @return Enum
      */
-    public static function byNameInsensitive(string $name): Enum
+    public static function byNameInsensitive(string $name)
     {
         return self::byName(Str::upper($name));
     }
@@ -47,7 +47,7 @@ public static function byNameInsensitive(string $name): Enum
      *
      * @return Enum
      */
-    public static function byValueInsensitive(string $value): Enum
+    public static function byValueInsensitive(string $value)
     {
         return self::byValue(Str::lower($value));
     }

src/Utils/Contracts/Enums/IEnumInsensitive.php

@@ -24,7 +24,7 @@ interface IEnumInsensitive
      *
      * @return Enum
      */
-    public static function byValueInsensitive(string $value): Enum;
+    public static function byValueInsensitive(string $value);
 
     /**
      * Retrieve enumeration instance by name, case insensitive
@@ -33,7 +33,7 @@ public static function byValueInsensitive(string $value): Enum;
      *
      * @return Enum
      */
-    public static function byNameInsensitive(string $name): Enum;
+    public static function byNameInsensitive(string $name);
 
     /**
      * String representing the different values of enumeration