Merge pull request #10 from SrBlecaute01/feature/inventory-properties

:memo: Updating comments

:fire: Removing weak inventory property.

:fire: Deleting test files.

:sparkles: Fixing conflicts.

:sparkles: Fixing conflicts.

:sparkles: Removing weak inventory property and adding new methods.

:art: Improving code structure.

:sparkles: Adding new types of the inventory property.

:sparkles: Adding new methods to get and remove properties.

:bookmark: Upgrading project version.

Merge pull request #9 from SrBlecaute01/fix/collections

:bug: Fixing collections types.

:art: Improving code structure.

:sparkles: Adding new types of the inventory property.