Fix some typos in docs

docs/advanced-usage/internal-structures.md

@@ -96,7 +96,7 @@ Extends from the `DataType` and has the following additional properties:
 
 An enum representing the kind of type of a property/parameter with respect to the package:
 
-- Default: a non package spefic type
+- Default: a non package specific type
 - DataObject: a data object
 - DataCollection: a `DataCollection` of data objects
 - DataPaginatedCollection: a `DataPaginatedCollection` of data objects

docs/as-a-data-transfer-object/casts.md

@@ -39,7 +39,7 @@ SongData::from([
 ]);
 ```
 
-And get an error because the first two properties are simple PHP types(string, int's, floats, booleans, arrays), but the following two properties are more complex types: `DateTime` and `Enum`, respectively.
+And get an error because the first two properties are simple PHP types(strings, ints, floats, booleans, arrays), but the following two properties are more complex types: `DateTime` and `Enum`, respectively.
 
 These types cannot be automatically created. A cast is needed to construct them from a string.
 

docs/as-a-data-transfer-object/request-to-data-object.md

@@ -73,7 +73,7 @@ You can resolve a data object from the container.
 app(SongData::class);
 ```
 
-We resolve a data object from the container, it's properties will allready be filled by the values of the request with matching key names.
+We resolve a data object from the container, its properties will already be filled by the values of the request with matching key names.
 If the request contains data that is not compatible with the data object, a validation exception will be thrown.