use pie-documents 0.1.0

from https://github.com/ArneBinder/pie-datasets/pull/209 (and https://github.com/ArneBinder/pie-datasets/pull/211), also see https://github.com/ArneBinder/pie-documents/releases/tag/v0.1.0

README.md

@@ -40,7 +40,7 @@ The `Attribute` annotation type is defined as follows:
 - `value` (type: `str`, optional)
 - `score` (type: `float`, optional, not included in comparison)
 
-See [here](https://github.com/ArneBinder/pie-modules/blob/main/src/pie_modules/annotations.py) for the remaining annotation type definitions.
+See [here](https://github.com/ArneBinder/pie-documents/blob/main/src/pie_documents/annotations.py) for the remaining annotation type definitions.
 
 ## Document Converters
 

requirements.txt

@@ -1,2 +1,2 @@
 pie-datasets>=0.10.11,<0.12.0
-pie-modules>=0.15.9,<0.16.0
+pie-documents>=0.1.0,<0.2.0