Remove all modifier from napari dependency (#110)

Closes #107

Author: jni

pyproject.toml

@@ -15,7 +15,7 @@ classifiers = [
     "Programming Language :: Python",
 ]
 dependencies = [
-    "napari[all]>=0.4.19",
+    "napari>=0.4.19",
     "python-rtmidi>=1.5.8",
     "pyyaml>=6.0.1",
     "pydantic>=2.7.1",
@@ -36,6 +36,7 @@ testing = [
     "pytest>=8.2.0",
     "pytest-cov>=5.0.0",
     "pytest-qt>=4.0.2",
+    "napari[all]",  # ensures Qt backend available for testing
     "flexparser!=0.4.0"  # see https://napari.zulipchat.com/#narrow/channel/212875-general/topic/broken.20pint.2Fflexparser/near/481110284
 ]
 dev = [