Update mock import to work with Python 3.13

spacy/tests/doc/test_underscore.py

@@ -1,5 +1,5 @@
 import pytest
-from mock import Mock
+from unittest.mock import Mock
 
 from spacy.tokens import Doc, Span, Token
 from spacy.tokens.underscore import Underscore

spacy/tests/matcher/test_dependency_matcher.py

@@ -3,7 +3,7 @@ import pickle
 import re
 
 import pytest
-from mock import Mock
+from unittest.mock import Mock
 
 from spacy.matcher import DependencyMatcher
 from spacy.tokens import Doc, Token

spacy/tests/matcher/test_matcher_api.py

@@ -1,5 +1,5 @@
 import pytest
-from mock import Mock
+from unittest.mock import Mock
 
 from spacy.matcher import Matcher
 from spacy.tokens import Doc, Span, Token

spacy/tests/matcher/test_phrase_matcher.py

@@ -2,7 +2,7 @@ import warnings
 
 import pytest
 import srsly
-from mock import Mock
+from unittest.mock import Mock
 
 from spacy.lang.en import English
 from spacy.matcher import Matcher, PhraseMatcher

spacy/tests/pipeline/test_analysis.py

@@ -1,5 +1,5 @@
 import pytest
-from mock import Mock
+from unittest.mock import Mock
 
 from spacy.language import Language
 from spacy.pipe_analysis import get_attr_info, validate_attrs